A ball is traveling with uniform translatory motion. This means that:

A cricket ball of mass 150 g has an initial velocity $\small {u = \left(3 \hat{i} + 4 \hat{j} \right) \text {ms}^{- 1}}$ and a  final velocity $\small {v = - \left( 3 \hat{i} + 4 \hat{j} \right) \text{ms}^{- 1}}$, after being hit. The change in momentum (final momentum-initial momentum) is (in kgm/s)
1. $\text {zero}$
2. $-\left ( 0.45\hat{i}+0.6\hat{j} \right )$
3. $-\left ( 0.9\hat{i}+1.2\hat{j} \right )$
4. $-5\left ( \hat{i} +\hat{j}\right )$

A cricket ball of mass 150 g has an initial velocity $\small {u = \left(3 \hat{i} + 4 \hat{j} \right) \text {ms}^{- 1}}$ and a  final velocity $\small {v = - \left( 3 \hat{i} + 4 \hat{j} \right) \text{ms}^{- 1}}$, after being hit, the magnitude of the momentum transferred during the hit is:
1. zero
2. 0.75 kg-ms^–1
3. 1.5 kg-ms^–1
4. 14 kg-ms^–1

Conservation of momentum in a collision between particles can be understood from:

A hockey player is moving northward and suddenly turns westward at the same speed to avoid an opponent. The force that acts on the player is:

A body of mass $2~\text{kg}$ travels according to the law $x \left( t \right) = pt + qt^2+ rt^3$ where, $p = 3 ~\text{ms }^{−1 },$ $q = 4 ~\text{ms }^{−2}$ and $r = 5 ~\text{ms }^{−3}$. The force acting on the body at $t = 2 ~\text{s }$ is

A body with a mass of $5$ kg is acted upon by a force $\vec{F}=( -3\hat{i} +4\hat{j})$ N. If its initial velocity at $t=0$ is $\vec{v}= ( 6\hat{i} -12\hat{j} )$ m/s, the time at which it will just have a velocity along the Y-axis is:
1. never
2. $10$ s
3. $2$ s
4. $15$ s

A car of mass $m$ starts from rest and acquires a velocity along the east, $v=v\mathrm{\hat{i}}(v>0)$ in two seconds. Assuming the car moves with uniform acceleration, the force exerted on the car is:

The motion of a particle of mass $m$ is given by $x=0$ for $t<0 ~\text s$, $x(t)=A~\text {sin}~4\pi t$ for $0<t<(1/4) \text s ~(A>0)$, and $x=0$ for $t>(1/4) ~\text s$. Then:

Which of the following statement/s is/are true?

In the figure, the coefficient of friction between the floor and body $B$ is $0.1.$ The coefficient of friction between bodies $B$ and $A$ is $0.2.$ A force $F$ is applied as shown on $B.$ The mass of $A$ is $m/2$ and of $B$ is $m.$

Which of the following statement(s) is/are true?
1. (a), (b), (d), (e)
2. (a), (c), (d), (e)
3. (b), (c), (d)
4. (a), (b), (c)