# 12.19.1. Work

Determine the power of a car that has an engine of force kg wt, given that the car’s maximum velocity is km/hr.

Show SolutionIf a car moving with maximum velocity of magnitude km/hr has an engine of power hp, calculate the magnitude of the force of its engine.

Show SolutionDetermine, in horsepower, the power exerted by an engine that is working at a uniform rate of .

- Ahp
- Bhp
- Chp
- Dhp

If an agricultural tractor has an engine power of hp, and the force of its tools is , find the magnitude of its maximum velocity.

Show SolutionIf a man of mass kg walked up an inclined plane of height 510 metres in 5 minutes, determine his power at this time.

- Ahp
- Bhp
- Chp
- Dhp

If a particle is moving in a straight line under the action of the force from point to point , find the work done by the force .

- A units of work
- B units of work
- C units of work
- D units of work

A force is acting on a particle so that its position vector as a function of time . Calculate the work done by the force when ranges from 3 seconds and 8 seconds, where is measured in newtons and in metres.

Show SolutionA particle moves in a straight line under the action of a force of 685 dynes acting in the direction of motion. Find the work done by the force during a displacement of cm, where the gravitational acceleration .

- A ergs
- B ergs
- C joules
- D ergs

If the kinetic energy of a gunshot having a mass of kg at a certain instant is 23 500 joules, find the magnitude of its velocity at the same instant.

- Am/s
- Bm/s
- Cm/s
- Dm/s

A body having a mass of gm is moving with a velocity given by the relation , where and are two constant perpendicular unit vectors. Find the value of its kinetic energy in ergs, given that its velocity is measured in cm/s.

- A1 250ergs
- B3 250ergs
- C6 500ergs
- D ergs

A body is moving with a velocity given by the relation , where and are two constant perpendicular unit vectors. Given that the velocity is measured in cm/s, and the kinetic energy of the body is 4.8 joules, find the mass of the body measured in grams.

Show SolutionGiven that a body having a mass of gm is moving with a velocity of m/s, find its kinetic energy measured in joules.

- A15.04joules
- B7 520joules
- C joules
- D7.52 joules

Find the kinetic energy of a body having a mass of kg which is moving with a velocity of cm/s measured in ergs.

- A ergs
- B ergs
- C769.5ergs
- D1 539ergs