Forces and Motion

Maria pushes with equal force on two objects. Object 1 has twice as much mass than Object 2.

Which of the following statements is true?

• Both objects will remain still.

• Object 1 will accelerate faster than Object 2.

• Object 2 will accelerate faster than Object 1.

• Both objects will accelerate at the same rate.

If all the forces acting upon an object at rest are balanced, what will the object do?

• The object will stay still.

• The object will slow down.

• The object will accelerate.

• The object will change position.

___________ is the force that slows and stops motion between touching objects.

• Gravity

• Pull

• Push

• Friction

What does air resistance do to falling objects?

• Makes them rise.

• Speeds them up.

• Slows them down.

• Makes them go POP.

Why is it harder for the boy in Image B to get down the hill?

• Motion

• Friction

• Work

• Displacement

If these boys are pulling with the same amount of force. What will happen?

• The boy in blue will win.

• They will not move at all.

• They boy in red will win.

• Both will fall down.

Philip is playing tug of war with Nancy. In order to win one player must pull the flag over their opponent's line, but during this game, the flag is tied to the centre of the rope and is not moving.

What is happening to the rope in this example?

• Philip is applying more force in one direction.

• Philip and Nancy are applying equal forces in the same direction.

• Nancy is applying more force in one direction.

• Philip and Nancy are applying equal forces in opposite directions.

Alice and Peter were moving a bookshelf across the carpet in their classroom. Even though they pushed as hard as they could, the bookshelf would only move a few inches at a time.

Which of the following best explains what happened as they tried to push the bookshelf?

• The force of gravity opposed the motion of the bookshelf.

• The force of friction opposed the motion of the bookshelf.

• When they tried to push the bookshelf, air resistance acted against them.

• When they pushed down the bookshelf, the bookshelf pushed back with an equal and opposite force.