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 65 N and the other pulls left with 35 N. What is the size of the net force, in newtons?
- 2.💪 Which force is at work: an apple falls down? (a) magnetic force (b) gravity (c) muscular force (d) friction
- 3.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
- 4.💪 Which force is at work: pedalling a cycle? (a) gravity (b) muscular force (c) friction (d) magnetic force
- 5.Which of these is caused by magnetic force? (a) a rolling ball slows (b) pedalling a cycle (c) a compass needle turns (d) a thrown ball comes down
- 6.True or false: a tug of war is a pull. (a) False (b) True
- 7.💪 A box weighs 410 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 8.True or false: drawing up a well bucket is a push. (a) False (b) True
- 9.💪 Which force is at work: squeezing a lemon? (a) friction (b) muscular force (c) gravity (d) magnetic force
- 10.💪 Two children push a box to the right, one with 75 N and the other with 5 N. What is the net (total) force on the box, in newtons?
- 11.💪 In a tug of war, one team pulls right with 55 N and the other pulls left with 25 N. What is the size of the net force, in newtons?
- 12.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) gravity (c) balanced (d) unbalanced
- 13.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) a river flows downhill (c) an apple falls down (d) a thrown ball comes down
- 14.💪 A cart is pulled to the right with 20 N and to the left with 20 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
- 15.True or false: hitting a cricket ball is a pull. (a) True (b) False
- 16.True or false: pressing a doorbell is a pull. (a) False (b) True
- 17.💪 Two children push a box to the right, one with 50 N and the other with 85 N. What is the net (total) force on the box, in newtons?
- 18.💪 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?
- 19.💪 A bag has a mass of 50 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 20.Which of these is caused by gravity? (a) squeezing a lemon (b) a rolling ball slows (c) a river flows downhill (d) a fridge magnet sticks
- 21.💪 Which force is at work: a magnet picks up pins? (a) gravity (b) friction (c) muscular force (d) magnetic force
- 22.True or false: closing a drawer is a pull. (a) False (b) True
- 23.💪 A bag has a mass of 59 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
- 24.True or false: pushing a trolley is a pull. (a) False (b) True
- 25.Which of these is caused by gravity? (a) squeezing a lemon (b) a rolling ball slows (c) rain falls to the ground (d) a fridge magnet sticks
- 26.💪 A box weighs 20 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 27.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
- 28.💪 A cart is pulled to the right with 45 N and to the left with 30 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
- 29.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
- 30.💪 Two children push a box to the right, one with 5 N and the other with 50 N. What is the net (total) force on the box, in newtons?
- 31.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
- 32.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
- 33.True or false: pulling up your socks is a pull. (a) True (b) False
- 34.Which of these is caused by friction? (a) a fridge magnet sticks (b) a rolling ball slows (c) rain falls to the ground (d) an apple falls down
- 35.Which of these is caused by muscular force? (a) a magnet picks up pins (b) shoes grip the floor (c) a thrown ball comes down (d) lifting a school bag
- 36.💪 A box weighs 460 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
- 37.💪 Two children push a box to the right, one with 10 N and the other with 35 N. What is the net (total) force on the box, in newtons?
- 38.Which of these is caused by friction? (a) a fridge magnet sticks (b) squeezing a lemon (c) lifting a school bag (d) shoes grip the floor
- 39.💪 Which force is at work: rain falls to the ground? (a) magnetic force (b) friction (c) gravity (d) muscular force
- 40.💪 A cart is pulled to the right with 95 N and to the left with 100 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
Answer key
- 30
- gravity
- a push
- muscular force
- a compass needle turns
- True
- 41
- False
- muscular force
- 80
- 30
- balanced
- a magnet picks up pins
- no net force
- False
- False
- 135
- 160
- 500
- a river flows downhill
- magnetic force
- False
- 590
- False
- rain falls to the ground
- 2
- a pull
- to the right
- a push
- 55
- a pull
- a push
- True
- a rolling ball slows
- lifting a school bag
- 46
- 45
- shoes grip the floor
- gravity
- to the left
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