# Physics

1. How much (Power/Force) is required to lift 8Kg 12meters up within 15sec?

2. Can you tell me difference Power Force from that question or anyway simple?

1. 👍
2. 👎
3. 👁
1. force = m g = 8 (9.81)

work = potential energy gained = m g h = 8 (9.81)(12)

power = work/time

= 8 (9.81)(12)/15

If for some incomprehensible reason you really ant power/force, divide

12/15

1. 👍
2. 👎
2. im trying to understand difference between power and force. if force is 8x9.8 thn there will be downforce. but this mass is going up which should be counter to the downforce. so liftforce is clearly greater thn downforce. Please explain clearly.

1. 👍
2. 👎
3. I assume that the mass is going up at constant speed. Therefore the force is m*g up to balance the weight of m*g down.

Power is another thing entirely, energy per unit time.

1. 👍
2. 👎

## Similar Questions

1. ### Physics (HELP)

Jill pulls on a rope to lift a 12 kg pail out of a well, while the clumsy jack watches. For a 10.0 meter segment of the lift, she lifts the bucket straight up at constant speed. How much power is required to complete this task in

2. ### physics

The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 55600 N. The lift force generated by the rotating blade makes an angle of 21.0° with respect to the

3. ### science

Calculate the work done in each of the following situations. (a) A horse pulls a wagon with a force of 1200 N and moves it 15 m. (b) A cable lifts an elevator 16 m by using a cable with a tension force of 2500 N. -How much work is

4. ### PHYSICS!

The piston of hydraulic automobile lift is 0.30 m in diameter. Calculate the gauge pressure required to lift a car with a mass 1000 kg in, A) Pascals B) Atm

1. ### Physics

A 1.0 e 3 kg elevator carries a maximum load of 800.0 kg. A constant frictional force of 4.0 e 3 N retards the elevator's motion upward. Waht minum power in kilowatts, must the motor deliver to lift the fully loaded elevator at a

2. ### Mechanics (Physics)

A man of mass M kg and his son of mass m kg are standing in a lift. When the lift is accelerating upwards with magnitude 1ms-2 the magnitude of the normal contact force exerted on the man by the lift floor is 880N. When the lift

3. ### Physics

Select which of the following statements are True or False. Assume Newtonian Mechanics. 1.The work required to lift a mass one meter depends on the speed at which it is raised.. 2.The acceleration of an object is same in all

4. ### physics

A pole AB of length 10m and weight 600N has its centre of gravity 4m from the end A, and lies on horizontal fround.calculate the force required to begin to lift the end.why would this force applied at the end A,not be sufficient

1. ### physics

During a lift off , the thrust a rocket produces must overcome the force of gravity in order to lift the rocket off the ground. If a rocket with a mass of 5kg produces a force of 180N, how fast will the rocket be travelling 3

2. ### Science

A fixed, single pulley that is used to lift a block does which one of the following? A. doubles the force required to lift the block B. decreases the force required to lift the block C. makes the block easier to lift by changing

3. ### physical science

how much power is required to lift the crate

4. ### physics

A box with a volume V = 0.03 m^3 lies at the bottom of a lake whose water has a density of 103 kg/m^3. (a) How much force is required to lift the box, if the mass of the box is 100 kg? (b) How much force is required to lift the