A force F required to keep a 5 kg mass moving round a cyc...
A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms-1. What is the speed, if the force is tripled?
4.0 ms-1
6.6 ms-1
12.1 ms-1
21.0 ms-1
Correct answer is C
The force which is centripetal
F = MV2R
=5 x 723.5
= 70
Since, force is 70 N when speed is 7m/s
Speed = ? when force 70N is trippled → 70 * 3 = 210N
210 = 5×v23.5
210 × 3.5 = 5 * v^2
735 ÷ 5 = v2
v2 = 147
v =12.12m/s
The silvered walls of a vacuum flask minimise loss of heat due to ...
The diagram given illustrates a wave form. Determine the speed of the wave ...
The instrument used in the measurement of atmospheric pressure is? ...
Which of the following statements is CORRECT about the earth's magnetic field? ...
The direction of the magnetic field at a point in the vicinity of a bar magnet is ...