# What is the speed of an object that has 7.5 joules of kinetic energy and a mass of 82 gr?

Kinetic energy E = 1/2 m v2

So v = ./(2 E / m)

E = 7.5 J and m = 0.082 kg.

Plugging and simplifying, we get

v = 13.525 m/s

### What is the kinetic energy of an object that has a mass of 20 kg and a speed of 2.8m per second?

The object's kinetic energy is 78.4 joules.

### What is a kinetic energy of an object that has mass of 20 kilograms and speed of 2.8ms?

78.4 joules at 2.8m/s

### Is kinetic energy measured in mass?

The kinetic energy of any moving object is 1/2 of (its mass) x (the square of its speed). The SI unit of any kind of energy is Joules.

### The amount of kinetic energy an object has depends upon?

Its mass and speed. The equation is KE = 1/2mv2. If m is mass in kg, and v is speed in m/s, then KE is kinetic energy in Joules.

### What is the kinetic energy of an object that has a mass of 20 kilo grams and a speed of 2.8 ms?

The kinetic energy is 78.4 kg x m^2 / s^2, or 78.4 Joules.

### A car has a mass of 2000 kg and is traveling at a speed of 30mpersec What is its kinetic energy in joules?

The car's kinetic energy is 900,000 joules.

### If the speed of an object doubles its kinetic energy?

If the speed of an object doubles, its kinetic energy quadruples. This is because velocity is squared in the formula for kinetic energy.

### How does the kinetic energy of an object changes when the speed of the object double?

Kinetic energy increases with the square of the speed. 2x the speed = 4x the energy, etc

### What is the kinetic energy of an object that has a mass of 30 kilo?

Can't be answered. You need to know the speed of an object to be able to calculate the kinetic energy. no speed, no kinetic energy.

### How does speed affects kinetic energy?

The kinetic energy of an object is proportional to the square of its speed.

### What is the relationship between mass and kinetic energy?

Kinetic energy is the energy of motion. The amount of kinetic energy an object has depends on the mass of the object and the speed of the object. The equation is: K= (1/2)mv^2, where K=kinetic energy, m=mass, and v=speed of the object.

### If speed is tripled then its kinetic energy of a mass is?

The formula for Kinetic Energy of an object is mv2/2 where m: mass of object and v:velocity of object Therefore when the speed of an object is tripled, then its kinetic energy becomes 9 times

### How does mass and velocity increase or decrease kinetic energy?

Kinetic energy of a mass is directly proportional to two variables: its mass and speed. Many mistake kinetic energy as being proportional to mass and velocity; it is, in fact, mass and speed. (With all technicalities aside, the speed is the factor that matters in computing kinetic energy of an object or a mass). Kinetic Energy = 0.5mv2 (m = mass and v = speed of the mass) Therefore, if the speed of the object… Read More

### What directly affects the kinetic energy of an object yall?

Kinetic energy is the energy due to the motion of an object. Kinetic energy increases when an object's mass or speed increases. It decreases when the mass or speed decreases. If the object stops, the kinetic energy is transformed into another form of energy.

### What is the kinetic energy of an object that has a mass of 20 kg and a speed of 2 point 8 m per s?

Kinetic Energy = 1/2 m V2 = 1/2 (20) (2.8)2 = 78.4 joules

### An object that has kinetic energy must have?

An object that has kinetic energy must have momentum, velocity, and speed. Momentum is mass times velocity. Kinetic energy is mass times velocity squared. Speed is distance divided by time. Kinetic energy is the energy of the object's motion. An object that has kinetic energy must have momentum because is the force or speed of movement. For example the ball gained momentum as it rolled down the hill. An object that has kinetic energy must… Read More

### A 50 kg cannon ball is shot horizontally from a cannon at a speed of 80 ms At this speed its kinetic energy will be joules?

Kinetic Energy = 1/2 M V2 = (25) (80)2 = 160,000 joules.

### What The build up of speed in a moving object?

Potential energy, which can be released as kinetic energy. Kinetic energy not the build up of speed in a moving object.

### How much energy is possessed by a moving body by virtue of its motion?

That's called kinetic energy. The formula is: Kinetic energy = (1/2) x mass x velocity2. If mass is in kilograms, and velocity (or speed, really) in meters per second, the energy will be in Joules. That's called kinetic energy. The formula is: Kinetic energy = (1/2) x mass x velocity2. If mass is in kilograms, and velocity (or speed, really) in meters per second, the energy will be in Joules. That's called kinetic energy. The… Read More

### What is the kinetic energy of a 80kg jogger running at 4m s?

The kinetic energy of any moving object is 1/2(mass)x(speed squared). The kinetic energy of an 80 kg jogger running at 4 m/s is 1/2(80)(16) = 640 joules.

### What is the speed of an object increases its kinetic energy .?

Not necessarily, If the speed of the object is constant then so is the KE.

### Are Volume and density are the kinetic energy of and object?

No, kinetic energy of an object depends upon mass and velocity. The amount of kinetic energy of an object in translational motion = 1/2mv2, provided the speed is low relative to the speed of light

### Is an object has more kinetic energy when it has more or less speed?

Kinetic energy is 1/2 times M times V^2 so the faster the object is moving the more kinetic energy it has more speed = more kinetic energy

### Which type the amount of kinetic energy an object has depend on?

The amount of kinetic energy an object has depends on its mass and speed.

### Who has more kinetic energy a running or walking person?

Original answer: running person ************** It depends on mass AND speed. Since energy is directly tied to MASS, then it all depends on the MASS * VELOCITY to figure which has more KINETIC ENERGY. To figure the kinetic energy in an object take 1/2 times the mass of the object times the square of the speed of the object. .5 * Mass * Velocity^2 = Energy in joules A running person has weighs 75 kilos… Read More

### What is the equation for a falling object?

The equation for the kinetic energy of a falling object is kinetic energy=1/2 an object's mass multiplied by it's speed squared. From this, we can work out the speed. First you need to know its weight and its kinetic energy. The kinetic energy is obtained by working out it's potential energy before it fell (Potential energy= mass multiplied by gravitational pull multiplied by height. Then, at whatever point during the fall, the decrease in potential… Read More

### What will happen to the kinetic energy of an object if its speed doubles?

At twice the speed, the kinetic energy will be four times greater.

### How does the kinetic energy of an object changes when the speed of an object doubles?

Kinetic energy is proportional to the square of the speed, 2 x the speed would give 4x the kinetic energy, 3x speed would be 9x energy, etc. A car travelling at 60MPH has 4x the energy than at 30 MPH

### What is the mass of a car that is traveling at a velocity of 60 meters per second north. The car has 5040000 joules of kinetic energy?

KE = 1/2 mv squared where v is velocity and m is mass. Solve m = (2 KE) divided by v squared= 2800 kg

### Where is the Kinetic energy at maximum?

Kinetic energy of any object is higher when the speed is highest.

### When The amount of kinetic energy and object has depends on its?

Kinetic energy depends on mass, and on speed.

### Why does kinetic energy increase as an object moves?

Kinetic energy increases as an object moves faster. An objects' kinetic energy will only change if the force acting on the object changes the object's speed.

### Does a fast moving object has more kinetic energy than a slow moving object?

no, not really, according the equation Ek=1/2mv2 kinetic energy of an object is directly proportional to mass and its speed. if an object is moving twice the speed of another object than its kinetic energy is also twice than the second object. But if the second object is double the mass of the first object than moving at half the speed still their kinetic energy will be the same.

### The primary factor in decreasing the kinetic energy of an object is to?

The primary factor in decreasing the kinetic energy of an object is to decrease its speed.

### Which will have the most kinetic energy?

Kinetic energy depends on both mass and speed, so an object will have a high kinetic energy if it has a high mass, a high speed, or both.

### How do you find the speed given joules and mass?

Use the formula for Kinetic Energy (KE), which is the energy due to the motion of an object. KE = (1/2) * (mass) * (velocity)2 where KE is in joules, mass is in kg, and velocity (or speed) would be in meters/sec...Just substitute the appropriate numbers, rearrange and solve for velocity

### Which has more kinetic energy- A small object or a large object moving at the speed of 25 mph?

You don't say what speed the small object has. If both have the same speed then the heavier one will have more kinetic energy.

### How do you compare kinetic energies on things that move?

Kinetic energy = (1/2)*mass*(speed)^2 where, in metric units, mass is in kilograms, speed is in meters/second, and kinetic energy is in Joules. So, you need to know the mass and the speed of the things.

### Explain how the kinetic energy of an object changes when the speed of the object doubles?

Kinetic energy is (1/2) (mass) (speed)2 . The only part of that formula we need in order to answer the question is the (speed)2 part. It says that if you multiply the speed by 'K', then the kinetic energy gets multiplied by K2 . So if you double the speed, the kinetic energy is multiplied by (2)2 = 4 .

### What happens to the kinetic energy when you double the speed?

Kinetic energy is calculated by the mass of the object times the SQUARE of the velocity. If you double the speed, kinetic energy is four times greater.

### When does an object have no kenetic energy?

Kinetic energy = (1/2) x mass x speed squared. An object will have no kinetic energy if it doesn't move.

### What happens to kinetic energy when the mass and speed of an object changes-?

Any change in mass or speed will cause a change in kinetic energy.

### How is the speed or veloocity related to object kinetic energy?

KE = 0.5*m*v^2 where m is the mass of the object.

### The energy an object has because of its motion?

Kinetic energy is the energy that an object has because of its motion. The energy depends on the speed and mass of the object.

### Why can satellites not attain the speed of light notwithstanding they are in absolute vacuum?

As the speed of an object approaches the speed of light, its kinetic energy approaches infinity. An object moving at the speed of light would require inifinite kinetic energy.

### As the mass of an object moving at a given speed decreases its kinetic energy does what?

Kinetic energy = 1/2 * mass * speed^2 When mass decreases, kinetic energy decreases proportionally.

### Kinetic Energy of an object increases as what increases?

Either the mass of the object or the speed of the object. However if the object is at rest, the increase of the mass will have no effect on its resting kinetic energy, which is zero.

### How can you calculate kinetic energy of an object?

The kinetic energy of an object is EK=mcV, where m is mass and c the speed of light and V the velocity.

### Does something have grater speed when it has more potential energy or less?

It can be a little complicated but I'll do my best to explain. Quick Vocab: potential energy - the stored energy in an object because of its position, shape, or condition. Kinetic energy - the energy of an object due to its motion. The more potential energy an object has the more Kinetic energy it will have. Basically when the object is moved the potential energy is released and becomes kinetic energy. As the kinetic… Read More