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.💪 Two children push a box to the right, one with 45 N and the other with 45 N. What is the net (total) force on the box, in newtons?
- 2.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
- 3.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
- 4.💪 A bag has a mass of 58 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 5.💪 A cart is pulled to the right with 20 N and to the left with 5 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
- 6.💪 A bag has a mass of 4 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 7.💪 A box weighs 290 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 8.💪 Two children push a box to the right, one with 5 N and the other with 40 N. What is the net (total) force on the box, in newtons?
- 9.Which of these is caused by friction? (a) pedalling a cycle (b) brakes stop a bicycle (c) a magnet picks up pins (d) squeezing a lemon
- 10.💪 Which force pulls everything towards the Earth? (a) wind (b) friction (c) magnetism (d) gravity
- 11.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
- 12.Which of these is caused by magnetic force? (a) a rolling ball slows (b) brakes stop a bicycle (c) pedalling a cycle (d) a fridge magnet sticks
- 13.💪 Which force is at work: a river flows downhill? (a) muscular force (b) gravity (c) magnetic force (d) friction
- 14.True or false: opening a drawer is a push. (a) True (b) False
- 15.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
- 16.💪 A cart is pulled to the right with 35 N and to the left with 25 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
- 17.Which of these is caused by friction? (a) a rolling ball slows (b) a compass needle turns (c) a fridge magnet sticks (d) a thrown ball comes down
- 18.💪 In a tug of war, one team pulls left with 35 N and the other pulls right with 25 N. What is the size of the net force, in newtons?
- 19.💪 A cart is pulled to the right with 85 N and to the left with 95 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
- 20.💪 Which force is at work: squeezing a lemon? (a) friction (b) gravity (c) magnetic force (d) muscular force
- 21.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) friction (c) muscular force (d) gravity
- 22.True or false: hitting a cricket ball is a push. (a) True (b) False
- 23.💪 A force is a … (a) kind of colour (b) push or a pull (c) type of sound (d) unit of time
- 24.💪 Which force is at work: a thrown ball comes down? (a) friction (b) muscular force (c) magnetic force (d) gravity
- 25.💪 In a tug of war, one team pulls right with 20 N and the other pulls left with 15 N. What is the size of the net force, in newtons?
- 26.True or false: kicking a football is a pull. (a) True (b) False
- 27.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
- 28.💪 Which can a force NOT do? (a) stop it moving (b) start it moving (c) change its shape (d) change its colour
- 29.💪 Which force is at work: pedalling a cycle? (a) gravity (b) muscular force (c) friction (d) magnetic force
- 30.True or false: pressing a doorbell is a pull. (a) True (b) False
- 31.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) gravity (c) doubled (d) balanced
- 32.💪 A box weighs 140 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 33.Which of these is caused by gravity? (a) a rolling ball slows (b) a compass needle turns (c) brakes stop a bicycle (d) a river flows downhill
- 34.True or false: pushing a trolley is a pull. (a) True (b) False
- 35.💪 Two children push a box to the right, one with 20 N and the other with 50 N. What is the net (total) force on the box, in newtons?
- 36.True or false: pushing a swing is a push. (a) True (b) False
- 37.💪 Which force is at work: an apple falls down? (a) friction (b) magnetic force (c) gravity (d) muscular force
- 38.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
- 39.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
- 40.True or false: plucking a mango is a pull. (a) True (b) False
Answer key
- 90
- 65
- a push
- 580
- to the right
- 40
- 29
- 45
- brakes stop a bicycle
- gravity
- a push
- a fridge magnet sticks
- gravity
- False
- a push
- to the right
- a rolling ball slows
- 10
- to the left
- muscular force
- friction
- True
- push or a pull
- gravity
- 5
- False
- a push
- change its colour
- muscular force
- False
- balanced
- 14
- a river flows downhill
- False
- 70
- True
- gravity
- a pull
- a pull
- True
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