Advertisements
Advertisements
Question
Name the force acting away from the centre of circular path.
Solution
Centrifugal force acts away from the centre of circular path.
APPEARS IN
RELATED QUESTIONS
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see the given figure). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
Work done = Force × ........................................
State two factors on which the work done on a body depends.
A boy of weight 40 kgf climbs up the 15 steps, each 15 cm high in 10 s and a girl of weight 20 kgf does the same in 5 s. Compare:
- the work done, and
- the power developed by them. Take g = 10 N kg-1.
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
What are the quantities on which the amount of work done depends? How are they related to work?
How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
In which of the following case the work done by a force will be maximum : when the angle between the direction of force and direction of motion is 0° or 90°?
In case of negative work, the angle between the force and displacement is :
How many joules are there in 1 mega joule?
List any six forms of energy and write a short note on each of them.
Name two places in India where electricity is generated from nuclear power plants.
What is the difference between renewable and non-renewable resources?
A girl of mass 40 kg runs a height of 80 stairs, each 25 cm high with a load of 20 kg on her head in 25 sec. If g is 10 m/s2, find:
(i) Gravitational force acting on the girl.
(ii) Work done by her.
(iii) Useful work done by her.
(iv) Her power in watt.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.