Forces and Motion
Grade 3 Science Worksheet
Circle the answer.
A box is pushed with 10 units of force from the left and 10 units from the right. What happens?
- it stays still, because the forces are balanced
- it moves up, because the forces meet
- it moves left, because the left push wins
- it moves right, because the right push wins
A box is pushed with 15 units from the left and 5 units from the right. Which way does it move?
- it spins in place
- to the right
- to the left
- it stays still
A ball rolls across a floor and slowly stops. Why?
- gravity pushes it backward
- air pushes it to the side
- the ball runs out of push inside it
- friction from the floor slows it
A pendulum takes 2 seconds to swing over and back. How long will 3 swings over and back take?
- 5 seconds
- 6 seconds
- 2 seconds
- 3 seconds
Which change will make a book stop sooner when it slides across a table?
- waxing the table smooth
- pushing the book harder
- putting a rough towel on the table
- sliding it on smooth glass
Two children ride a seesaw. When one end goes up, what does the other end do?
- it spins around
- it stays still
- it goes down
- it goes up too
A marble rolls back and forth in a bowl. Each time it goes a little less high up the side. What will happen if no one pushes it?
- it will roll higher each time
- it will stop near the top
- it will stop at the bottom
- it will roll out of the bowl
Team A pulls a rope with 50 units of force. Team B pulls with 70 units. What happens?
- the rope breaks in the middle
- the rope moves toward Team A
- the rope stays still
- the rope moves toward Team B
Which is an example of balanced forces?
- a ball rolling faster down a hill
- a wagon speeding up when pulled
- a kicked ball changing direction
- a book resting on a table
A ball is dropped from 1 meter and from 2 meters. Which one is moving faster when it lands?
- the ball from 2 meters
- neither, they float down
- the ball from 1 meter
- both at the same speed