Newton's Third Law of Motion and Impulse

Which of the following best describes Impulse?

• Change in velocity

• Change in momentum

• Force applied over a distance

• Mass time acceleration

Newton's third law of motion states that:

• An object in motion stays in motion

• For every action, there is an equal and opposite reaction

• Force equals mass times acceleration

• The acceleration of an object is proportional to the net force acting on it

Impulse is equal to:

• Mass times velocity

• Force times distance

• Force times time

• Mass times acceleration

When two objects interact, the forces they exert on each other are:

• Always equal in magnitude and opposite in direction

• Equal in magnitude and in the same direction

• • Different in magnitude and opposite in direction

• Different in magnitude and in the same direction

If a force acts on an object for a longer period of time, the impulse:

• Decreases

• Increases

• Remains the same

• Becomes zero

According to Newton's third law, the force pair (action and reaction):

• Act on the same body

• Act on different objects

• Are in the same direction

• Are not equal in magnitude

The unit of impulse in the SI system is:

• Newton (N)

• Newton-second (Ns)

• Kilogram-meter per second (kg.m/s)

• Joule (J)

When a car crashes into a wall, the wall exerts a force on the car that is:

• Greater than the force the car exerts on the wall

• Less than the force the car exerts on the wall

• Equal to the force the car exerts on the wall

• Zero

Which of the following best describes Newton's third law in a collision?

• Both objects experience forces of equal magnitude but opposite direction.

• Both objects experience forces of different magnitudes in the same direction.

• Only the object with greater mass exerts a force.

• • Only the object with lesser mass exerts a force.

A 2 kg object moving at 5 m/s collides with a stationary object. If the collision lasts 0.1 seconds and the force exerted during the collision is 100 N, what is the impulse experienced by the object?

• 5 Ns

• 10 Ns

• 15 Ns

• 20 Ns