Question Text
Question 1 :
If action is always equal to the reaction, explain how a horse can pull a cart?
Question 2 :
Who had first presented three fundamental laws that govern the motion of objects?
Question 3 :
A girl of mass 40 kg jumps with a horizontal velocity of 5 $ms^{-1}$ onto a stationary cart with frictionless wheels. The mass of the cart is 3 kg. What is her velocity as the cart starts moving? Assume that there is no external unbalanced force working in the horizontal direction.
Question 4 :
Which of the following has more inertia; a bicycle and a train?
Question 5 :
In a qualitative way, the tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called ________.
Question 6 :
A bullet of mass 20 g is horizontally fired with a velocity 150 $ms^{-1}$ from a pistol of mass 2 kg. What is the recoil velocity of the pistol?
Question 7 :
A stone of 1 kg is thrown with a velocity of 20 $ms^{-1}$ across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?
Question 8 :
Which of the following has more inertia; a five-rupees coin and a one-rupee coin?