Laws of Motion ...

A person is moving on a rough horizontal surface towards east. Then the direction of friction force is towards

A plane travelling at $$300 {m}/{s}$$ banks its wings to enter into a horizontal circular turn. The circular path has a radius of $$2.7 km$$.
Which of these values best represents the angle of the wings relative to the horizontal if the plane experiences no change in its altitude during the turn?

A ball of mass 100 g is moving with a velocity of 10 m $$s^{-1}$$. The force of the blow by the bat acts for 0.01 seconds. What is the force exerted on the ball by the bat if the ball retraces its path with same speed?

Match the entries in Column I with those in Column II.

A mass of 2 kg at rest travels for 4 seconds with an acceleration of 1.5 m $$s^{-2}$$. Find the gain of the momentum of the body.

To avoid slipping while walking on ice, one should take smaller steps because:

A cricket ball of mass 500 g is moving with a speed of 36 km $$h^{-1}$$. It is reflected with the same speed. What is the impulse applied on it?

Due to an impulse, the change in the momentum of a body is 1.8 kg m $$s^{-1}$$. If the duration of the impulse is 0.2 s, then what is the force produced in it?

For the plank depicted above, a man who weighs $$\dfrac{1}{8}$$ the weight of the plank stands halfway between the pivot and the center of mass of the plank.
If the plank weighs $$500 N$$ and $$\theta={30}^{o}$$, which of the following values best represents the tension in the cable?

China wares are wrapped in straw or paper before packing. What is the basis of this application?