Kinetic Energy and Potential Energy

Calculate the kinetic energy of a bus of mass ${10}^4\mathrm{kg}$ moving with a speed of $108\mathrm{km} {\mathrm{h}}^{-1}$.

Which of the following is non-conservative force?

If the momentum of the body increases by $10\%$ then the increase in Kinetic energy of the body is

A car weighing $1800$ kg changes its speed from $18$ km/h to $108$km/h in $5$ seconds and a loaded truck weighing $9000$ kg changes its speed from$36$ km/h to $72$ km/h in $10$seconds. Find the ratio of the power of the car to the power of the truck.

A ball is dropped from a height of 20 m if it loses 10% of its kinetic energy on striking the ground, what is the height to which it bounces after its 3rd touchdown?

A bomb of 12 kg explodes into two pieces of masses 4 kg and 8 kg. The velocity of 8 kg is 6 m/s. The kinetic energy of the other mass is ?

An automobile engine of mass $m$accelerates and constant power $P$is applied by the engine. The instantaneous speed of the engine will be

If p and E represent linear momentum and kinetic energy respectively, then the graph between E and p is correctly shown by ?

Two unequal masses possess the same momentum, then the kinetic energy of the heavier mass is _____ the kinetic energy of the lighter mass.

Which of the following graph represents the potential energy and Kinetic Energy of a ball dropped from a height and reaches the ground?

Mark true or false and choose the appropriate option: 1. When the velocity of a ball decreases by 25% then K.E. also decreases by 44% nearly. 2. When the momentum of an object is increased by 25% then K.E. also increases by 44% nearly 3. If a ball dropped from height loses 25% of its K.E. striking the ground then the ball loses its height also by 25% after the bounce.

When the momentum of a body increases by$100\%$, its K.E. increases by ?

Two unequal masses posses the same K.E. Then, the heavier mass has.

Work done upon a body is

Which of the following is true for an Unstable equilibrium ?

The $K\mathit{.}E\mathit{.}$ acquired by a mass $m$ in travelling a certain distance $d$, starting from rest, under the action of a constant force is directly proportional to:

Kinetic energy of a body can be increased more by _____.

An air molecule of mass $5.0\times {10}^{-26} \mathrm{kg}$ and moving with a speed of $500 \mathrm{m} {\mathrm{s}}^{-1}$ has a kinetic energy of about $\left(e=1.6\times {10}^{-19} \mathrm{C}\right)$