Q. 263.8( 6 Votes )

# How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 400 W, be able to lift at constant speed of 1 ms^{–1} vertically? (g = 10 ms^{–2})

Answer :

Power = 400 W

Speed = 1m/s

g = 10 m/s^{2}

Power = mgh/t = mgv

m = power/ g x speed = 400/ (10 x 1) = 40 Kg

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUSWhat is power? How do you differentiate kilowatt from kilowatt hour? The Jog Falls in Karnataka state are nearly 40 m high. 2000 tones of water falls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g = 10 m s–2)NEXTDefine watt. Express kilowatt in terms of joule per second. A 200 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 m s–1?

Related Videos

Quiz | Lets Solve Numericals54 mins

Let's Calculate Workdone by a Body42 mins

Smart Revision | Let's Understand Power40 mins

Foundation | Let us Understand Law of Conservation of Energy44 mins

NCERT | Introduction to Work39 mins

Smart Revision | Master Work and Its Concepts47 mins

Lakhmir Singh | Work, Energy and Power38 mins

Smart Revision | Let us Calculate the Energy53 mins

Quiz | Lets Solve the Numericals57 mins

Rapid Fire Quiz53 mins

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Expertsview all courses

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation

RELATED QUESTIONS :

Define power. Give the SI unit of power.

Lakhmir Singh & Manjit Kaur - PhysicsAn electric motor raises a load of 0.2 kg, at a constant speed, through a vertical distance of 3.0 m in 2 s. If the acceleration power stations and thermal power stations, alternators produce electricity

A. 0.3 B. 1.2

C. 3.0 D. 6.0

Lakhmir Singh & Manjit Kaur - PhysicsHow many watts equal one horse power?

Lakhmir Singh & Manjit Kaur - PhysicsName two units of power bigger than watt.

Lakhmir Singh & Manjit Kaur - Physics