Collisions

Multiple Choice

Which of the following is true according to Newton's laws about the effect of force on an object?

• A force can only make a moving object speed up.

• A force can make a resting object move and speed up.

• A force has no effect on objects at rest.

• A force can only change the direction of a moving object.

Open Ended

How do Newton's laws help us understand what happens during a collision between two objects?

Multiple Choice

Which of the following best describes a collision?

• When two objects come into contact with each other

• When an object moves in a straight line

• When two objects repel each other

• When an object is at rest

Fill in the Blank

In a collision, we can determine how the force changes the ___ of the objects.

Open Ended

How does Newton’s Third Law of Motion explain the forces involved when a cue ball strikes another ball in a game of pool?

Multiple Choice

According to Newton’s Third Law, when a skateboarder pushes against the ground, what force does the ground exert in response?

• An equal and opposite force on the skateboarder’s foot

• No force at all

• A force in the same direction as the push

• A force that slows the skateboarder down

Open Ended

Explain how Newton’s Third Law of Motion applies to a bird flying in the air.

Multiple Select

Which of the following are examples of Newton’s Third Law of Motion?

• A bird flying by pushing air downward

• A car accelerating on a road

• A person sitting quietly

• A skateboarder pushing against the ground

Multiple Choice

Which of the following best describes Newton's First Law of Motion?

• An object will maintain its state of motion unless a net force is exerted on it.

• An object will always move unless stopped by friction.

• An object will accelerate if it is at rest.

• An object will stop moving if no force is applied.

Multiple Choice

What happens to an object when a net force is exerted on it, according to Newton's First Law?

• Its velocity changes.

• It disappears.

• It remains at rest forever.

• It loses mass.

Fill in the Blank

This change in velocity is called ___.

Open Ended

Explain how Newton's Second Law of Motion relates force, mass, and acceleration. Provide an example to support your explanation.

Multiple Select

Select all statements that are correct based on Newton's Second Law of Motion.

• To accelerate a heavier object equally, more force is needed.

• Force equals mass times acceleration.

• A lighter object requires more force to accelerate than a heavier object.

• If two objects are accelerated equally, the one with greater mass needs more force.

Fill in the Blank

The formula for acceleration is a = (___ - u) ÷ t.

Multiple Choice

What is the acceleration of a bike if its velocity changes from 3 m/s to 5 m/s in 10 seconds?

• 0.1 m/s²

• 0.2 m/s²

• 0.5 m/s²

• 2 m/s²

Fill in the Blank

Positive acceleration means speeding up, while negative acceleration means ___

Multiple Choice

Which of the following best describes an inelastic collision?

• Objects keep their shape after the collision.

• Objects change shape or stick together after the collision.

• Objects bounce off each other without any deformation.

• Objects move in opposite directions after the collision.

Multiple Select

Which of the following statements about elastic and inelastic collisions are correct?

• Elastic collisions: objects keep their shape.

• Inelastic collisions: objects stick together.

• Elastic collisions: objects change shape permanently.

• Inelastic collisions: objects bounce off each other without sticking.

Open Ended

Explain how crumple zones in cars help reduce the force experienced during a collision.

Open Ended

Describe the role of accident reconstruction scientists in studying car collisions.

Open Ended

How do Newton's Laws help us understand what happens during collisions?

Multiple Choice

How does a force affect an object that is at rest and an object that is already moving?

• A force can only affect objects that are moving.

• A force can make a resting object move and a moving object change its speed or direction.

• A force has no effect on objects at rest.

• A force can only slow down objects.