A satellite travels in a circular orbit at a speed of 20,000 km/hr to stay at a constant altitude. To escape from the earth, the speed would have to be increased to
The correct unit of magnetic flux in SI system is
When a body undergoes an acceleration
With the help of dimensions method it can be proved that frequency of a stretched wire
A 40kg cart moving at 3 m/s makes a head a head-on collision with a 20 kg cart at rest, as illustrated in Fig. 1.If the collision is completely inelastic, the speed with winch the carts leave the impact is approximately
If C is proportional to D, then
If the earth stopped rotating, the weight of objects at the equator would
A projectile is fired at an angle of 37° with an initial speed of 100 m/s. What is the approximate versicle component of its velocity after 2s?
The static friction is
Which of the following pairs have identical dimensions?
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