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slega [8]
3 years ago
6

a body whose mass is 40kg runs up a flight of 30steps,each 150mm high in 6 seconds.Find the average power developed​

Physics
1 answer:
AURORKA [14]3 years ago
4 0

Answer:g=a=10m/s^2,

M=40kg,

S=150mm/1000=0.15m*30steps each=4.5m,

F=ma=40*10=400N

Power=W/t=F*s/t=F*V=1800/6 = 300W or 0.3kW

Explanation:

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3 years ago
Heavy crate sits at rest on the floor of a warehouse. you push on the crate with a force of 400 n, and it doesn't budge. what is
maks197457 [2]

Heavy crate sits at rest on the floor of a warehouse. you push on the crate with a force of 400 N, and it doesn't budge. The magnitude of the friction force on the crate in Newton is 400N

This is due to Friction force, which is defined as the resisting force that acts on a body when it is at rest (Static friction) or when it is in motion (Kinetic friction).

When a force is applied on a stationary body, the force of static friction starts to act on the body which prevents any relative motion between the object and surface. The magnitude of friction increases up to μsN, where μs is the coefficient of static friction. As the crate didn't budge, it means the amount of force applied was less than μsN. Hence the force applied was canceled by an equal and opposite amount of frictional force which was equal to 400N.

Learn more about frictional force here

brainly.com/question/1714663

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