63 questions in Forces and motion
Most triedMost missedNewest- What is the weight of an object?
- What is speed?
- A car travels 120 km in 2 hours. What is its average speed?
- A cyclist travels 30 km in 1.5 hours. What is the average speed?
- Why is it easier to cut with a sharp knife than a blunt one?
- Why do camels and elephants have wide feet?
- Using a long spanner makes it easier to loosen a nut because ___.
- In a lever, what is the fixed point it turns on called?
- Which tool is a lever with the fulcrum between the effort and the load?
- Why do we oil a bicycle chain?
- Which force keeps the moon in orbit around the Earth?
- An object weighs 50 N on Earth. What happens to its mass on the moon?
- What is the formula for weight?
- What is the weight of a 5 kg bag on Earth (g = 10 N/kg)?
- What is the difference between mass and weight?
- What is the formula for pressure?
- A box with weight 200 N rests on an area of 2 m². What pressure does it exert?
- Which is a contact force?
- Which is a non-contact force?
- What happens when two equal forces act on an object in opposite directions?
- What is work done?
- A learner pushes a box with a force of 50 N over 4 m. How much work is done?
- What is power?
- A pump does 3 000 J of work in 60 s. What is its power?
- Why is no machine 100% efficient?
- A machine needs 400 J of input to do 300 J of useful work. What is its efficiency?
- What is the mechanical advantage of a machine?
- A lever lifts a 600 N load with an effort of 200 N. What is the mechanical advantage?
- What is acceleration?
- A car speeds up from 0 to 20 m/s in 5 s. What is its acceleration?