Force and Motion

Which force acts to slow down a car by using brakes?

• friction

• gravity

• magnetism

• pulling

A girl is watching a rock move in a fast stream. She makes a map of the stream and shows where the rock is at two different times. The arrows show the direction the water is moving. Which of these statements should the girl write in her notebook?

• The water pushed the rock to the west.

• The water pulled the rock to the east.

• The rock pushed the water to the west.

• The rock pulled the water to the east.

A boy starts riding his bike from Plant City at 1 P.M. and reaches Dodge Town at 5P.M. Which of the following best describes the motion of the bike?

• 50 km/hour eastward

• 25 km/hour westward

• 200 km/hour eastward

• 300 km/hour westward

A pitcher throws a ball. In which direction will the ball move when viewed from the side?

• → and ↑

• → and ↓

• ← and ↑

• ← and ↓

The ball moves in the first direction because of the force placed on the ball by the pitcher. Which force causes the ball to move in the second direction?

• magnetism

• friction

• heat

• gravity

A soccer ball is kicked. The forces of gravity and air resistance act on the ball after it is kicked. Which path best shows how the ball will probably move after it is kicked?

• 1

• 2

• 3

• 4

Kids ride on a merry-go-round. Which best describes the motion of the kids?

• curving

• straight line

• circular

• back-and-forth

A scientist is studying the movement of a mysterious rock. He writes that the rock slid 2 meters to the east. Then it slid 5 meters to the south? Which map shows the track the rock made when it slid?

• A

• B

• C

• D

Which best describes the motion of this clock's pendelum?

• straight line in one direction

• bouncing up and down

• circular

• back-and-forth

Which set of directions will guide someone from the start to the end?

• 1km south, 1km east, 3 km north, 2 km west

• 3 km east, 2 km south, 1 km west, 1 km north

• 2 km east, 3 km south, 1 km west, 1 km north

• 1 km southeast