MCQ- 9 ICSE Physics class 10 ch-1 FORCE ,WORK, POWER AND ENERGY

Machines - Numericals Quiz

1. A machine has an MA of 4 and a VR of 5. What is its efficiency?

60% 80% 100% 50%

2. A lever has an effort arm of 40 cm and a load arm of 10 cm. What is its mechanical advantage?

2 4 5 10

3. A pulley system has 3 pulleys. If the load moves 2 meters, how far does the effort move?

2m 3m 6m 1m

4. A machine requires 500 J of work input to produce 400 J of useful work output. What is its efficiency?

80% 100% 50% 60%

5. A crane lifts a 100 kg load to a height of 5 m in 10 seconds. Find its power. (g = 9.8 m/s²)

49 W 490 W 500 W 1000 W