Laws of Motion

Related Questions

• A body of mass 5 kg starts from the origin with an initial velocity $\overrightarrow {u\,} \, = \,30\hat i + 40\hat j\,m{s^{ - 1}}$. If a constant force $\overrightarrow {F\,} = - (\hat i + 5\hat j)N$ acts on the body, the time in which the y–component of the velocity becomes zero is

  ---

• A lift of mass 1000 kg is moving with an acceleration of 1 $m/{s^2}$ in upward direction. Tension developed in the string, which is connected to the lift, is

  ---

• A car having a mass of 1000 kg is moving at a speed of 30 metres/sec. Brakes are applied to bring the car to rest. If the frictional force between the tyres and the road surface is 5000 newtons, the car will come to rest in

  ---

• The time in which a force of 2 N produces a change of momentum of $0.4\,kg - m{s^{ - 1}}$ in the body is

  ---

• Two trolleys of mass m and 3m are connected by a spring. They were compressed and released once, they move off in opposite direction and comes to rest after covering distances ${S_1}$and ${S_2}$ respectively. Assuming the coefficient of friction to be uniform, the ratio of distances ${S_1}:{S_2}$ is

  ---