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A worker with spikes on his shoes applies a constant horizontal force of 20 N to push a 40-kg box across a frictionless frozen lake. What is the acceleration of the box?
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What is the SI unit of negative acceleration?
The SI unit for acceleration is meters per second squared. This applies to ANY acceleration.
What is the relation between mass and acceleration when you keep the force constant?
For a constant external force applied on an object, the more massive the object is the less its acceleration. That is , mass and acceleration are inversely proportional: as one increases, the other decreases. Newton's Second Law of Motion The net external force on a body is equal to the product of the body's mass and acceleration. Fnet =mass* acceleration This law shows the inverse relationship between mass and acceleration.
What factor changes the velocity of an object?
A change in velocity is an acceleration. Since velocity includes speed and direction, a change in either of them is an acceleration. An object travelling in a circle at a constant speed is accelerating continuously although the speed is constant. The acceleration towards the centre is equal to v-squared / r where v is the speed and r is the radius of curvature. This formula also applies to a momentary deviation on a curved path. The formula comes from Isaac Newton which he discovered by using the newly developed mathematical technique of differential calculus. Since velocity is a vector, a change in direction at constant speed can be represented as a vector at right-angles to the velocity.
How can an object moving at a constant speed have a nonzero acceleration?
Let's review some terms before we tackle this one. Speed is displacement per unit of time. We know 60 miles per hour is a speed. Velocity is speed with a direction vector associated with it. We know 60 miles per hour east is velocity. Acceleration is a change in velocity. That means if an object changes its speed or its direction or both, it is accelerating.If an object has a given velocity and it slows down or speeds up, it is accelerated. But if the same object changes direction without a change in speed, it is still experiencing acceleration. A force had to act on the object to change its direction, even though its speed didn't change. Thus, an object can accelerate even though it does not change speed.
Is G is the force of gravity?
Nope. G is a universal constant that applies to all physical objects on earth. The product of an object's mass (m) and G will result in the object's weight, which is just the gravitational pull on the object (the force of gravity). G has the same unit as acceleration. See Newton's second law of motion.
As you increase the force applied to a rolling ball the acceleration of the ball increases this is an example of what law?
if you increase the force , the mass remaining constant, a new rate of acceleration applies in the order a = f/m from that point (second law)
What is the SI unit of negative acceleration?
The SI unit for acceleration is meters per second squared. This applies to ANY acceleration.
What statement applies to the horizontal rows or periods in the periodic table.?
The statement applies to the horizontal rows or periods in the Periodic Table is that properties change going across each row.
What statement applies to the horizontal rows or periods in the periodic table?
The statement applies to the horizontal rows or periods in the periodic table is that properties change going across each row.
What is the relation between mass and acceleration when you keep the force constant?
For a constant external force applied on an object, the more massive the object is the less its acceleration. That is , mass and acceleration are inversely proportional: as one increases, the other decreases. Newton's Second Law of Motion The net external force on a body is equal to the product of the body's mass and acceleration. Fnet =mass* acceleration This law shows the inverse relationship between mass and acceleration.
When a car is moving in reverse backing from a driveway the driver applies the brake in what direction is the car's acceleration?
The car's acceleration is in forward direction.
What factor changes the velocity of an object?
A change in velocity is an acceleration. Since velocity includes speed and direction, a change in either of them is an acceleration. An object travelling in a circle at a constant speed is accelerating continuously although the speed is constant. The acceleration towards the centre is equal to v-squared / r where v is the speed and r is the radius of curvature. This formula also applies to a momentary deviation on a curved path. The formula comes from Isaac Newton which he discovered by using the newly developed mathematical technique of differential calculus. Since velocity is a vector, a change in direction at constant speed can be represented as a vector at right-angles to the velocity.
Super throws a 2400-N boulder at an adversary what horizontal force must Superman apply to the boulder to give it a horizontal acceleration of 12.0 ms2?
According to Newton's second law of motion force is equivalent to mass times acceleration: F = m * a In this case: Assuming no mistake with the units, the mass of boulder is given as a force the gravity applies on it(weight). If it is Earth's gravitational field, the mass is: m = 2400 N / g = 244.65 kg. Force will be then: F = 244.65 * 12 = 2935.78 N
What does newtons first law of motion state about objects at rest and objects in motion?
An object in motion will not change its motion unless acted on by an external force. This applies to zero motion also.
When riding in a car we can sense changes in speed or direction through the forces the car applies on us. Do we wear seat belts in cars and airplanes to protect us from speed or from acceleration?
Acceleration
How can an object moving at a constant speed have a nonzero acceleration?
Let's review some terms before we tackle this one. Speed is displacement per unit of time. We know 60 miles per hour is a speed. Velocity is speed with a direction vector associated with it. We know 60 miles per hour east is velocity. Acceleration is a change in velocity. That means if an object changes its speed or its direction or both, it is accelerating.If an object has a given velocity and it slows down or speeds up, it is accelerated. But if the same object changes direction without a change in speed, it is still experiencing acceleration. A force had to act on the object to change its direction, even though its speed didn't change. Thus, an object can accelerate even though it does not change speed.
What calculation of a mass x acceleration applies to which newtons law of motion?
force = mass x accelerationThat is Newton's Second Law.
