Physics
The motion of a boat moving away from the shore is an example of :
- Newton's first law
- Newton's second law
- Newton's third law
- not related with Newton's law
Answer
Newton's third law
Reason — To move a boat ahead in water, the boatman pushes (action) the water backwards with his oar and at the same time, the water exerts an equal and opposite force (reaction) in the forward direction on the boat due to which the boat moves ahead. Hence, it is an example of Newton's third law
Related Questions
A bullet of mass 50 g moving with an initial velocity of 100 m s-1, strikes a wooden block and comes to rest after penetrating a distance 2 cm in it. Calculate (i) initial momentum of the bullet (ii) final momentum of the bullet, (iii) retardation caused by the wooden block, and (iv) resistive force exerted by the wooden block
Newton's third law —
- defines the force qualitatively
- defines the force quantitatively
- explains the way a force acts on a body
- gives the direction of force.
A footballer hits a football with a force of 10 N. What force does the footballer experience ?
- 5 N
- 10 N
- 20 N
- 15 N