A warehouse uses either a conveyor belt or a cargo lift to raise a heavy crate from the ground floor to a storage mezzanine. The conveyor belt takes 15 s to carry the crate between the two floors. The useful work done against gravity is $W\,$ and the useful power developed is $P$ . The cargo lift takes 10 s to carry the same crate between the same two floors.

Which option correctly describes the useful work done against gravity by the cargo lift, and the useful power developed by the cargo lift?

Useful work is $W$ , useful power is more than $P$ .

Useful work is $W$ , useful power is less than $P$ .

Useful work is more than $W$ , useful power is more than $P$ .

Useful work is more than $W$ , useful power is $P$ .

Which option correctly describes the useful work done against gravity by the cargo lift, and the useful power developed by the cargo lift?

Useful work is $W$ , useful power is more than $P$ .

Useful work is $W$ , useful power is less than $P$ .

Useful work is more than $W$ , useful power is more than $P$ .

Useful work is more than $W$ , useful power is $P$ .

1.7.4 Power

Question 69

Markscheme

1.7.4 Power

Question 69

Markscheme

1.7.4 Power

Question 69

1.7.4 Power Questions

1.7.4 Power

Question 69

1.7.4 Power Questions