Mechanics | Relativity Answers

A motorcycle’s brakes are designed to absorb 35 kJ/s. The motorcycle and rider have a mass of 280 kg and are travelling at 100 km/h. How fast will they be going after 3 seconds braking

A projectile is thrown with a speed v at an angle (kuch bhi manle )
with upward vertical . its average velocity between the instants at which it croses half the maximum height

Sometimes a car overturns while turning at a curve.In such a case
a)the inner wheels leave the ground first
b)the outer wheels leave the ground first
c)both the outer and inner wheels leave the ground simultaneously
d)either of the wheels can leave the ground first

A monkey of 20kg mass is holding a light rope that passes over a frictionless pulley.A bunch of bananas of same mass is tied to the other end of rope.In order to get access to the bunch the monkey starts climbing .The distance between the monkey and the bananas is
a)decreasing
b)increasing
c)unchanged
d)nothing can be stated

A body is placed on an inclined plane and has to be pushed down.what is the angle made by the normal with the vertical?
a)equal to angle of repose
b)equal to the angle of friction
c)less than the angle of repose
d)more than the angle of repose

For a rocket propulsion velocity of exhaust gases relative to rocket is 2km/s.If mass of rocket system is 1000kg,then what is the rate of fuel consumption for a rocket to rise up with acceleration 4.9m/s^2?

THE MOTION OF A PARTICLE IS DESCRIBED BY AN EQUATION X=3t+6t-5t where x is meters and t is seconds find the postion acceleration of particle in 2 seconds

Does a mosquito flying inside a moving car, experiences a force in the opposite direction of the motion of the car? If so what would be the reason?

A student drops a ball form a window 3.5 meters above the sidewalk, How fast is it moving when it hits the sidewalk

1. a bucket of water of mass 5 kg is tied with a rope of length 50cm is rotated in a vertical circle.if the bucket rotates 10 rotations i 1 min,calculate the maximum velocity with which it can be rotated without spilling the water at the highest point

2. the centripetal force acting on a body of mas 500g is 10x10 power of -2 Newton.if the radius of the path is 10m,calculate the velocity with which the body moves

3. two forces of magnitude 5N and 10N are incligned with each other by 30 degree.what is the magnitud and direction of the resultant

4. a cyclist travel in a circular arbit of radius 200m.the angle of baking is 30 degree,what is the maximum velocity with which he can travel without skidding

5. a car of weight 1000kg travel with a speed of 25km/h in a curved path of radius 100m.what is the angle through which the outer track is raised so as to have a safe turn