Newton's Laws and Forces

Which of the following would experience the greatest acceleration?

• a 5 kg ball kicked with a 20 N force

• a 5 k ball kicked with a 10 N force

• a 3 kg ball kicked with a 60 N force

• a 3 kg ball kicked with a 10 N force

Which of the following will cause an object to increase its acceleration?

• increasing the mass

• increasing the net force

• increasing friction

• increasing inertia

You leave your jacket on the sofa and go to bed. When you wake up in the morning, your jacket is exactly where you left it. Which term best explains this?

• inertia

• mass

• force

• friction

You are initially at rest in a cart on a rollercoaster. When the cart starts to move forward, you fell as if you have been pushed backwards. Why?

• Your inertia keeps you moving backwards.

• Your inertia keeps you moving forward.

• Your inertia keeps you at rest.

• Your inertia accelerates you backwards.

How much force is needed to accelerate an 80 kg rider on a 250 kg motorcycle at 4 m/s²?

• 320 N

• 1000 N

• 1030 N

• 1320 N

A sled is experiencing two forces. One is a pulling force of 4 N north and the other force is 4 N south. Which of the following correctly describes the objects motion?

• It is accelerating.

• It is moving at constant velocity.

• It is speeding up.

• It is changing direction.

Tony drops his golden ninja Lego figure from a tree. Which of the following correctly identifies the forces acting on the golden ninja as it falls?

• Air resistance and gravity are balanced, accelerating the figure to the ground.

• Air resistance and gravity are unbalanced, accelerating the figure to the ground.

• Air resistance and gravity are unbalanced, causing the figure to fall with constant velocity,

• Air resistance and gravity are balanced, causing the figure to slow down as it falls.

If the sum of all the forces acting on a moving object is zero, the object will

• accelerate

• speed up

• slow down

• move in a straight line

Which of the following describes the net force on an object in equilibrium?

• net force is positive

• net force is negative

• net force is zero

• net force is positive or negative

Which of the following statements correctly describes the amount of force needed to accelerate a tennis ball and bowling ball by the same amount?

• A larger force is needed to accelerate the tennis ball compared to the bowling ball.

• A smaller force is needed to accelerate the tennis ball compared to the bowling ball.

• A smaller force is needed to accelerate the bowling ball compared to the tennis ball.

• Both balls need to have the same amount of force.