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Newtons Laws of Motion

The three laws proposed by Sir Isaac Newton to define the concept of a force and describe motion, used as the basis of classical mechanics.

1,508 Questions

Do action and reaction forces act in succession or simultaneously?

Action and reaction forces act simultaneously. For every action force, there is an equal and opposite reaction force acting on a different object. This principle is known as Newton's third law of motion.

When a skydiver jumps out of an airplane there are two forces acting on her gravity and air resistance After falling for a few seconds the forces due to gravity and air resistance balance each other?

Your question is slightly confusing as you seem to have answered it yourself.

A little extra though, the speed at which the skydiver is now travelling is called terminal velocity and it is the fastest an object can travel with only gravity + air resistance acting on it as forces. Due to differing air resistances everything has its own unique terminal velocity and it is possible to alter it, this is the principle behind a parachute.

The net force on a golf cart is 390 N north which has a total mass of 270 kg what are the magnitude and direction of the cart's acceleration?

You want to use: Acceleration = force/mass.

The force is pushing it north (don't forget to draw your free-body diagram).

Accel. =390/270

Your answer should be 1.4 m/s/s and it is going in the north direction.

That's it =]

What is the difference between Newton's laws of motion?

First law: The velocity of a body remains constant unless the body is acted upon by an external force

Second law: The acceleration a of a body is parallel and directly proportional to the net force F and inversely proportional to the mass m, i.e., F = ma.

Third law: The mutual forces of action and reaction between two bodies are equal, opposite and collinear.

What is the net force when you combine a force of 7N north with a force of 5N south?

The net force is 2N north. This is because when you subtract the 5N force south from the 7N force north, you get a resultant force of 2N north.

What type of friction between 2 objects that prevent the object from moving is?

Static friction occurs between two objects that are not moving relative to each other and prevents the objects from sliding against each other.

An ant falling from the roof of a house lands unharmed because of?

An ant's small size and low mass result in a low terminal velocity compared to larger, heavier objects. This means that the ant does not reach a speed that would cause harm upon impact with the ground. Additionally, the ant's exoskeleton provides some protection by absorbing the impact forces of the fall.

When the ball bounces off a wall the net force on the ball is zero because of action and reaction forces?

The net force on the ball is not zero. The ball exerts a force on the wall (the action), and the wall exerts an equal and opposite reaction force on the ball. These two forces do not sum to zero as they are acting on different objects; the action of the ball acts on the wall and the reaction of the wall acts on the ball.

How does newton's second law affect the movement of softball?

When a pitcher pitches the ball, she (or he) applies a force to it to push it over the plate. Depending on the size of the ball they use and the amount of force applied, the ball will take a different path to the plate. So if a pitcher applies a lot of force with a small ball, the ball will go faster. If the pitcher applies little force to a large ball it may not travel as quickly.

A sprinter of a mass 65.0 kg starts his race by pushing horizontally backward on the starting blocks with a force of 200 N What force causes him to accelerate out of the block?

The force of static friction between the sprinter's foot and the starting block causes him to accelerate out of the block. The static friction force acts forward on the sprinter, helping him overcome the backward force he exerts on the starting blocks.

A rocket ship leaves earth's atmosphere its initial velocity is less than its final velocity which is this an example of?

This is an example of acceleration. Acceleration is the rate at which an object changes its velocity, either by speeding up or slowing down. In this case, the rocket ship is speeding up as it leaves Earth's atmosphere, with its final velocity being greater than its initial velocity.

Force pairs act on what object?

Force pairs act on an object when that object exerts a force on another object and, in response, experiences an equal and opposite force from the other object. This is based on Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.

Use sliding friction in a sentence?

Sliding friction occurs when two surfaces slide against each other, creating resistance and frictional force that opposes the motion.

Do the laws of motion apply to the speed of light and movement in atoms?

In fact, the laws of motion do apply; you just have to be careful which set of laws you use. Newtonian laws of motion do not apply to light or to the movement of atoms, but relativity theory applies to light, and quantum mechanics applies to movements at the atomic and sub-atomic levels.

A 50.0-kilogram object in outer space is attracted to a nearby planet with a net force of 400. newtons. What is the magnitude of the object's acceleration?

Using Newton's second law (F=ma), we can rearrange the equation to solve for acceleration: a = F/m. Plugging in the values gives us a = 400 N / 50 kg = 8 m/s^2. Therefore, the magnitude of the object's acceleration towards the planet is 8 m/s^2.

What is the net force or the resultant force acting on an object in equilibrium?

0. An object in equilibrium has constant velocity, which makes its acceleration 0. Since net force=mass times acceleration, this would make the net force zero.

Note that there could be multiple forces acting on the object, but since it is in equilibrium they would have to be equal and opposite in direction, to cancel all of the forces out. This would make the net force zero.

Do any objects have no friction at all?

No. All materials have the slightest bit of friction. Even if an object may look smooth to the human eye, it has a microscopic jagged side. Even something as smooth as ice has a little friction

What is engine bounce?

Engine bounce is a phenomenon where the engine speed rises rapidly and then drops back down while the vehicle is idling. This can be caused by issues with the fuel system, ignition system, or engine timing. It can lead to rough idling and poor engine performance.

Which Law of Motion states that The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force in the same direction as the net force and invers?

This statement describes Newton's Second Law of Motion, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically, this is described as F = ma, where F is the net force, m is the mass of the object, and a is its acceleration.

An average force of 4000 newtons acts for 0.01 seconds on a bullet of mass 50g calcualte the speed of the bullet?

50 g = 0.05 kg

F = m A

A = F/m = 4000/0.05 = 80,000 meters per second2

If the bullet starts from rest and no other forces act on it, then

Speed = (acceleration) x (time) = (80,000) x (0.01) = 800 meters per second

A bus decreases its speed from 80km h-1 to 60km h-1 in 5 seconds Find the acceleration of the bus?

The acceleration of the bus can be calculated using the formula: acceleration = (final velocity - initial velocity) / time. Plugging in the values: acceleration = (60 km/h - 80 km/h) / 5 s = (-20 km/h) / 5 s = -4 km/h/s. Therefore, the acceleration of the bus is -4 km/h/s.

Example for convertig rotatory to linear motion?

One example of converting rotary motion to linear motion is using a lead screw. When a rotary force is applied to the lead screw, it translates that rotational motion into linear motion along the axis of the screw. This conversion is commonly used in applications such as CNC machines and 3D printers.

A weightlifter expends 294 W of power lifting a weight to a height of 2 m in 10 seconds What mass has he lifted?

To calculate the mass lifted, first calculate the work done using the formula Work = Power x Time. In this case, Work = 294 W x 10 s = 2940 J. Then, use the formula for work done against gravity, which is Work = Force x Distance. Substitute the values 2940 J for Work, 2 m for Distance, and 9.81 m/s^2 for acceleration due to gravity to find the Force (Weight). Finally, use the formula Weight = mass x gravity, where gravity is 9.81 m/s^2, to determine the mass lifted.

How does Newtons 3rd law of motion apply to a horse jumping?

Newton's Third Law states that "for every action, there is an equal and opposite reaction."

And so the horse jumps by pushing against the earth in which the earth then pushes an equal and opposite amount of force on the horse which makes it goes up in the air.