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 10 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
- 2.True or false: closing a drawer is a push. (a) True (b) False
- 3.💪 Which force is at work: a thrown ball comes down? (a) muscular force (b) magnetic force (c) gravity (d) friction
- 4.True or false: hitting a cricket ball is a push. (a) False (b) True
- 5.💪 A cart is pulled to the right with 70 N and to the left with 80 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
- 6.True or false: pressing a doorbell is a pull. (a) True (b) False
- 7.True or false: plucking a mango is a pull. (a) False (b) True
- 8.💪 Which force is at work: an apple falls down? (a) muscular force (b) friction (c) magnetic force (d) gravity
- 9.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
- 10.💪 Two children push a box to the right, one with 25 N and the other with 40 N. What is the net (total) force on the box, in newtons?
- 11.💪 A bag has a mass of 25 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 12.💪 Which force is at work: brakes stop a bicycle? (a) gravity (b) magnetic force (c) friction (d) muscular force
- 13.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
- 14.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
- 15.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
- 16.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
- 17.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
- 18.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) balanced (c) unbalanced (d) doubled
- 19.💪 Two children push a box to the right, one with 30 N and the other with 95 N. What is the net (total) force on the box, in newtons?
- 20.💪 Which force is at work: shoes grip the floor? (a) gravity (b) muscular force (c) magnetic force (d) friction
- 21.💪 A force is a … (a) kind of colour (b) push or a pull (c) unit of time (d) type of sound
- 22.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) second (s) (d) metre (m)
- 23.💪 A bag has a mass of 18 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 24.True or false: hitting a cricket ball is a pull. (a) False (b) True
- 25.💪 A box weighs 140 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 26.True or false: drawing up a well bucket is a push. (a) False (b) True
- 27.💪 A cart is pulled to the right with 65 N and to the left with 65 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
- 28.💪 Which force is at work: squeezing a lemon? (a) magnetic force (b) friction (c) muscular force (d) gravity
- 29.💪 Two children push a box to the right, one with 95 N and the other with 30 N. What is the net (total) force on the box, in newtons?
- 30.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
- 31.Which of these is caused by gravity? (a) shoes grip the floor (b) a river flows downhill (c) squeezing a lemon (d) a magnet picks up pins
- 32.💪 Which force is at work: a river flows downhill? (a) magnetic force (b) muscular force (c) gravity (d) friction
- 33.Which of these is caused by muscular force? (a) a magnet picks up pins (b) a fridge magnet sticks (c) a compass needle turns (d) pedalling a cycle
- 34.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) a rolling ball slows (c) lifting a school bag (d) a compass needle turns
- 35.True or false: kicking a football is a pull. (a) False (b) True
- 36.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
- 37.💪 In a tug of war, one team pulls left with 35 N and the other pulls right with 20 N. What is the size of the net force, in newtons?
- 38.💪 Two children push a box to the right, one with 55 N and the other with 40 N. What is the net (total) force on the box, in newtons?
- 39.💪 In a tug of war, one team pulls right with 60 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
- 40.Which of these is caused by friction? (a) a fridge magnet sticks (b) rain falls to the ground (c) a compass needle turns (d) rubbing hands warms them
Answer key
- 5
- True
- gravity
- True
- to the left
- False
- True
- gravity
- a push
- 65
- 250
- friction
- a pull
- a push
- a pull
- a pull
- a pull
- balanced
- 125
- friction
- push or a pull
- newton (N)
- 180
- False
- 14
- False
- no net force
- muscular force
- 125
- a pull
- a river flows downhill
- gravity
- pedalling a cycle
- lifting a school bag
- False
- a push
- 15
- 95
- 55
- rubbing hands warms them
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