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Which way will it move? Predict from the forces

3rd grade (Year 4 in England) · 16 questions · Common Core: NGSS.3-PS2-1 · England: KS2 Y3 Forces and magnets, KS3 Physics: Motion and forces (balanced forces)

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Score/ 16

1
Question 1
A box is resting on smooth ice. It is pushed with 60 N to the left and 15 N to the right at the same time. What happens?
- A. moves to the left
- B. stays still
- C. moves to the right
2
Question 2
True or false? An object with balanced forces must be still.
- A. True
- B. False
3
Question 3
A book lies still on a table. Gravity pulls it down. Why doesn't it fall?
- A. The book is too light for gravity.
- B. There is no gravity indoors.
- C. The book is holding on to the table.
- D. The table pushes up with an equal force, so the forces are balanced.
4
Question 4
A box is resting on smooth ice. It is pushed with 15 N to the left and 55 N to the right at the same time. What happens?
- A. moves to the left
- B. stays still
- C. moves to the right
5
Question 5
True or false? Unbalanced forces can make an object start, stop, speed up or turn.
- A. True
- B. False
6
Question 6
A book lies still on a table. Gravity pulls it down. Why doesn't it fall?
- A. There is no gravity indoors.
- B. The table pushes up with an equal force, so the forces are balanced.
- C. The book is holding on to the table.
- D. The book is too light for gravity.
7
Question 7
A box is resting on smooth ice. It is pushed with 60 N to the left and 60 N to the right at the same time. What happens?
- A. moves to the left
- B. stays still
- C. moves to the right
8
Question 8
True or false? A still object stays still if the forces on it are balanced.
- A. True
- B. False
9
Question 9
A book lies still on a table. Gravity pulls it down. Why doesn't it fall?
- A. There is no gravity indoors.
- B. The table pushes up with an equal force, so the forces are balanced.
- C. The book is too light for gravity.
- D. The book is holding on to the table.
10
Question 10
A box is resting on smooth ice. It is pushed with 40 N to the left and 55 N to the right at the same time. What happens?
- A. moves to the left
- B. stays still
- C. moves to the right
11
Question 11
True or false? An object with balanced forces must be still.
- A. True
- B. False
12
Question 12
A book lies still on a table. Gravity pulls it down. Why doesn't it fall?
- A. The book is holding on to the table.
- B. The book is too light for gravity.
- C. There is no gravity indoors.
- D. The table pushes up with an equal force, so the forces are balanced.
13
Question 13
A box is resting on smooth ice. It is pushed with 30 N to the left and 10 N to the right at the same time. What happens?
- A. moves to the left
- B. stays still
- C. moves to the right
14
Question 14
True or false? An object with balanced forces must be still.
- A. True
- B. False
15
Question 15
A rolling ball slows down and stops on grass. Which force caused this?
- A. friction from the grass
- B. no force, it just ran out
- C. magnetism
- D. a push from the ball
16
Question 16
A box is resting on smooth ice. It is pushed with 25 N to the left and 30 N to the right at the same time. What happens?
- A. moves to the left
- B. stays still
- C. moves to the right

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Answer key: Which way will it move? Predict from the forces

1. A. moves to the left
2. B. False
3. D. The table pushes up with an equal force, so the forces are balanced.
4. C. moves to the right
5. A. True
6. B. The table pushes up with an equal force, so the forces are balanced.
7. B. stays still
8. A. True
9. B. The table pushes up with an equal force, so the forces are balanced.
10. C. moves to the right
11. B. False
12. D. The table pushes up with an equal force, so the forces are balanced.
13. A. moves to the left
14. B. False
15. A. friction from the grass
16. C. moves to the right