Engineering Worksheet: Forces
Engineer's tip (Add same way, subtract opposite): Push moves away, pull moves towards; force is measured in newtons (N). Same direction: add. Opposite directions: bigger − smaller, towards the bigger. Weight (N) ≈ mass (kg) × 10.
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- 1.💪 In a tug of war, one team pulls right with 30 N and the other pulls left with 15 N. What is the size of the net force, in newtons?
- 2.💪 Which force is at work: a river flows downhill? (a) friction (b) gravity (c) muscular force (d) magnetic force
- 3.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
- 4.Which of these is caused by magnetic force? (a) a rolling ball slows (b) pedalling a cycle (c) lifting a school bag (d) a compass needle turns
- 5.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
- 6.True or false: closing a drawer is a pull. (a) False (b) True
- 7.True or false: pulling a cart is a pull. (a) False (b) True
- 8.💪 A bag has a mass of 31 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 9.💪 A bag has a mass of 50 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 10.💪 Which force is at work: pedalling a cycle? (a) gravity (b) muscular force (c) friction (d) magnetic force
- 11.💪 A cart is pulled to the right with 45 N and to the left with 55 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
- 12.💪 Which force is at work: a thrown ball comes down? (a) friction (b) magnetic force (c) muscular force (d) gravity
- 13.True or false: a tug of war is a pull. (a) True (b) False
- 14.💪 Which force is at work: shoes grip the floor? (a) magnetic force (b) gravity (c) friction (d) muscular force
- 15.💪 In which unit do we measure force? (a) litre (L) (b) second (s) (c) metre (m) (d) newton (N)
- 16.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
- 17.💪 In a tug of war, one team pulls left with 90 N and the other pulls right with 30 N. What is the size of the net force, in newtons?
- 18.💪 Two children push a box to the right, one with 30 N and the other with 65 N. What is the net (total) force on the box, in newtons?
- 19.Which of these is caused by magnetic force? (a) a rolling ball slows (b) a fridge magnet sticks (c) a river flows downhill (d) squeezing a lemon
- 20.💪 Which force is at work: lifting a school bag? (a) muscular force (b) magnetic force (c) friction (d) gravity
- 21.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) rain falls to the ground (c) squeezing a lemon (d) lifting a school bag
- 22.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) friction (c) magnetic force (d) gravity
- 23.Which of these is caused by muscular force? (a) squeezing a lemon (b) rain falls to the ground (c) a magnet picks up pins (d) shoes grip the floor
- 24.💪 Which force is at work: brakes stop a bicycle? (a) gravity (b) magnetic force (c) friction (d) muscular force
- 25.💪 A box weighs 240 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 26.💪 A cart is pulled to the right with 40 N and to the left with 25 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
- 27.True or false: kicking a football is a pull. (a) True (b) False
- 28.💪 In a tug of war, one team pulls left with 95 N and the other pulls right with 75 N. What is the size of the net force, in newtons?
- 29.True or false: hitting a cricket ball is a pull. (a) False (b) True
- 30.True or false: hitting a cricket ball is a push. (a) True (b) False
- 31.True or false: pushing a swing is a pull. (a) True (b) False
- 32.💪 A cart is pulled to the right with 90 N and to the left with 100 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
- 33.Which of these is caused by friction? (a) a thrown ball comes down (b) rain falls to the ground (c) a magnet picks up pins (d) a rolling ball slows
- 34.💪 A bag has a mass of 33 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 35.Which of these is caused by gravity? (a) a compass needle turns (b) a fridge magnet sticks (c) a river flows downhill (d) lifting a school bag
- 36.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) gravity (c) doubled (d) unbalanced
- 37.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
- 38.💪 Two children push a box to the right, one with 65 N and the other with 95 N. What is the net (total) force on the box, in newtons?
- 39.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
- 40.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
Answer key
- 15
- gravity
- a pull
- a compass needle turns
- a pull
- False
- True
- 310
- 500
- muscular force
- to the left
- gravity
- True
- friction
- newton (N)
- a pull
- 60
- 95
- a fridge magnet sticks
- muscular force
- a magnet picks up pins
- magnetic force
- squeezing a lemon
- friction
- 24
- to the right
- False
- 20
- False
- True
- False
- to the left
- a rolling ball slows
- 330
- a river flows downhill
- balanced
- a pull
- 160
- a push
- a push
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