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.💪 Which force is at work: a thrown ball comes down? (a) muscular force (b) gravity (c) friction (d) magnetic force
- 2.💪 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?
- 3.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) doubled (c) gravity (d) balanced
- 4.💪 Which force is at work: brakes stop a bicycle? (a) magnetic force (b) gravity (c) friction (d) muscular force
- 5.Which of these is caused by gravity? (a) a compass needle turns (b) shoes grip the floor (c) an apple falls down (d) lifting a school bag
- 6.True or false: kicking a football is a push. (a) True (b) False
- 7.💪 A cart is pulled to the right with 25 N and to the left with 35 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
- 8.💪 Two children push a box to the right, one with 25 N and the other with 5 N. What is the net (total) force on the box, in newtons?
- 9.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its shape (d) change its colour
- 10.💪 Two children push a box to the right, one with 30 N and the other with 25 N. What is the net (total) force on the box, in newtons?
- 11.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
- 12.💪 In a tug of war, one team pulls right with 60 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
- 13.True or false: closing a drawer is a pull. (a) True (b) False
- 14.Which of these is caused by muscular force? (a) a thrown ball comes down (b) rain falls to the ground (c) pedalling a cycle (d) a fridge magnet sticks
- 15.💪 Which force is at work: a river flows downhill? (a) muscular force (b) friction (c) magnetic force (d) gravity
- 16.💪 Two children push a box to the right, one with 75 N and the other with 85 N. What is the net (total) force on the box, in newtons?
- 17.💪 A box weighs 80 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 18.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
- 19.💪 Which force is at work: rain falls to the ground? (a) friction (b) magnetic force (c) muscular force (d) gravity
- 20.Which of these is caused by magnetic force? (a) brakes stop a bicycle (b) an apple falls down (c) rain falls to the ground (d) a compass needle turns
- 21.True or false: pulling a cart is a pull. (a) True (b) False
- 22.💪 A cart is pulled to the right with 65 N and to the left with 70 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
- 23.True or false: pushing a trolley is a pull. (a) True (b) False
- 24.True or false: plucking a mango is a pull. (a) True (b) False
- 25.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) newton (N) (d) second (s)
- 26.💪 A box weighs 160 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 27.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) friction (c) magnetic force (d) gravity
- 28.💪 A box weighs 320 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 29.Which of these is caused by friction? (a) a thrown ball comes down (b) rain falls to the ground (c) rubbing hands warms them (d) an apple falls down
- 30.💪 A cart is pulled to the right with 65 N and to the left with 60 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
- 31.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
- 32.💪 Which force is at work: shoes grip the floor? (a) gravity (b) muscular force (c) magnetic force (d) friction
- 33.True or false: pushing a trolley is a push. (a) True (b) False
- 34.True or false: hitting a cricket ball is a push. (a) True (b) False
- 35.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) muscular force (c) gravity (d) friction
- 36.💪 A bag has a mass of 25 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 37.True or false: pressing a doorbell is a push. (a) False (b) True
- 38.💪 A cart is pulled to the right with 60 N and to the left with 75 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
- 39.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
- 40.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) wind (d) magnetism
Answer key
- gravity
- 15
- balanced
- friction
- an apple falls down
- True
- to the left
- 30
- change its colour
- 55
- a pull
- 40
- False
- pedalling a cycle
- gravity
- 160
- 8
- a push
- gravity
- a compass needle turns
- True
- to the left
- False
- True
- newton (N)
- 16
- magnetic force
- 32
- rubbing hands warms them
- to the right
- a push
- friction
- True
- True
- friction
- 250
- True
- to the left
- a pull
- gravity
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