Force and Motion

Which of the following objects will have the greatest change in motion?

• A small force is applied to an object with a large mass.

• A small force is applied to an object with a small mass.

• A large force is applied to an object with a large mass.

• A large force is applied to an object with a small mass.

A boy is playing with a tennis ball. He throws the ball on the ground, and the ball bounces as shown in the diagram.

After bouncing a number of times, the ball comes to rest on the ground. Which factor causes the ball to fall toward the ground after bouncing?

• pull of gravity

• size of the ball

• mass of the ball

• speed of the wind

If the arrows represent force, which direction will this box move?

• up

• down

• it won't move

If the arrows represent force, which direction will this box move?

• up

• down

• it won't move

If the arrows represent force, which direction will this box move?

• up

• down

• it won't move

If the arrows represent force, which direction will this box move?

• up

• down

• it won't move

Which description correctly describes the pull of gravity on Earth?

• toward Earth's Northern Hemisphere

• toward Earth's Southern Hemisphere

• towards Earth's center

• towards Earth's poles

Tori tests how far three identical toy cars travel under three different conditions. How is Tori controlling variables for each trial?

• The mass and force change.

• Neither the mass nor force changes.

• The mass changes, but the force does not change.

• The force changes, but the mass does not change.

Kaneesha pushes a toy truck and lets it roll across a flat surface. She measures the distance it travels. Then she adds different numbers of wood blocks to her truck.

Which is most likely the measurement missing from the table?

• 28 cm

• 30 cm

• 64 cm

• 102 cm

Four forces are acting on the block above.

Under which of the following conditions will the block begin to move?

• Fg is greater than Ff.

• Fg is less than F.

• F is greater than Ff.

• Fn and Fg are equal.