alleryStart learning →Why do hill climbing shoes have rough soles?
- To get more weight
- To get less friction
- To get more grip
- To get more light
Show answer and solution
Correct answer: C. To get more grip
Rough soles raise friction with the ground, which stops slipping.
Olympiad (Class 4) Force, work and energy — practice questions — page 2
Explore 60 free Force, work and energy questions in Olympiad (Class 4) Science. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–60 of 60.
Why do hill climbing shoes have rough soles?Read the answer and worked solution →A bucket hangs from a rope. Which force in the rope holds the bucket up?Read the answer and worked solution →A spring is pulled and then let go. It goes back to its length because of which force?Read the answer and worked solution →Which of these needs a pull rather than a push?Read the answer and worked solution →A big stone and a small stone are dropped together from the same height with no air. How do they land?Read the answer and worked solution →In science, work is done when a force moves an object. Which is work?Read the answer and worked solution →Ria pushes a heavy wall with all her strength but it does not move. How much work is done on the wall?Read the answer and worked solution →A force of 5 N moves a box 2 m. Work is force times distance. How many joules of work?Read the answer and worked solution →A force of 4 N moves a trolley 6 m. Using work = force x distance, how much work is done?Read the answer and worked solution →Which does more work: lifting a 2 N book 1 m up, or lifting a 2 N book 3 m up?Read the answer and worked solution →Sam pushes a box 10 m with 3 N. Tara pushes another box 10 m with 5 N. Who does more work?Read the answer and worked solution →A lever lets you lift a heavy rock with a small push. What do you give up?Read the answer and worked solution →A rolling ball slows down and stops. What happens to its energy?Read the answer and worked solution →A bulb gives out 10 J of light and 90 J of heat. How much electric energy did it use?Read the answer and worked solution →A toy car has 50 J of energy at the top of a slope. If 20 J turns into heat, how much goes into motion?Read the answer and worked solution →A machine takes in 100 J of energy and gives out 70 J of useful work. How much is wasted as heat?Read the answer and worked solution →The wind turns the blades of a windmill. Which energy do the moving blades have?Read the answer and worked solution →Two same cars drive at 20 km/h and 60 km/h. Which has more kinetic energy?Read the answer and worked solution →Two same stones are held 2 m and 5 m above the ground. Which has more potential energy?Read the answer and worked solution →A pressed spring toy is released and jumps up. Its stored energy was which kind?Read the answer and worked solution →Burning wood gives out stored chemical energy as which energy?Read the answer and worked solution →The energy stored in food is which kind of energy?Read the answer and worked solution →A solar panel changes sunlight into which energy that can run a fan?Read the answer and worked solution →A girl eats lunch and then runs. Which energy change happens in her body?Read the answer and worked solution →Meena uses a short steep ramp and Ali uses a long gentle ramp to lift a barrel onto a truck. Who needs the smaller push?Read the answer and worked solution →A ball is thrown up. What happens to its speed as it rises?Read the answer and worked solution →A ball thrown up stops for a moment at its highest point. Which energy is greatest there?Read the answer and worked solution →Wind, rain and storms on Earth are driven by energy from which body?Read the answer and worked solution →A magnet pulls a nail towards it. A force like this can act in which way?Read the answer and worked solution →Water at a hydro dam makes electricity. Where did the water's energy first come from?Read the answer and worked solution →
Worked practice questions
A bucket hangs from a rope. Which force in the rope holds the bucket up?
- Friction
- Wind force
- Magnetism
- Tension
Show answer and solution
Correct answer: D. Tension
A pulled rope carries a pulling force called tension.
A spring is pulled and then let go. It goes back to its length because of which force?
- Elastic force
- Frictional force
- Magnetic force
- Wind force
Show answer and solution
Correct answer: A. Elastic force
A stretched spring pulls itself back by its elastic force.
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