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A particle has a lifetime of 0.100 s when observed while it moves at a speed of service 0.650c with respect to the laboratory. What is its lifetime in its rest frame?
A ball of mass 1.0kg is moving in a circle of radius 1.0m. Calculate its acceleration if it moves with a constant angular speed of 2.0 rads-1. Suppose the ball starts from rest and moves with a constant angular acceleration of 0.02 rads-2. What is the net force on the ball 60 s after it starts moving from rest ?
A stone is dropped from the top of a tower and one second later, a second stone is thrown vertically
downward with a velocity 20 ms-1
. The second stone will overtake the first after travelling a distance of
A 100-N piano is moved 20 m across a floor by a horizontal force of 35 N. Find the coefficient of friction. What happens to the energy ?
#331389 on Nov 2022