Advertisements
Advertisements
प्रश्न
What do you mean by uniform circular motion?
Advertisements
उत्तर
When a particle moves with a constant speed in a circular path, its motion is said to be the uniform circular motion.
APPEARS IN
संबंधित प्रश्न
When a body moves in a circular path, how much work is done by the body? Give reason.
(Hint: The body is acted upon by the centripetal force.)
What physical quantity does the electron volt (eV) measure? How is it related to the S.I. unit of that quality?
How is kilowatt hour related to joule?
Differentiate between work and power.
Name the quality which is measured in kWh.
A boy weighing 350 N climbs up 30 steps, each 20 cm high in 1 minute, Calculate:
- the work done and
- power spent.
Is it possible that no transfer of energy may take place even when a force is applied to a body?
A body is provided at a point. A force of 20 N is applied at a distance of 40 cm from the pivot. Find the moment of force about the pivot.
The world record for weight lifting was held by Sergei Didyk of the USSR. He lifted 261 kg to a height of 2.3 m in 4s; find:
(a) Weight lifted by him
(b) Work done by him
(c) Power developed by him. (g = 10m/s2)
A man raises a box of mass 50 kg to a height of 2 m in 20 s, while another man raises the same box to the same height in 50 s. Compare:
- the work done, and
- the power developed by them. Take g = 10 N kg-1
