Factors Affecting Kinetic Energy

Q.

The magnitude of the kinetic energy of a body is ‘k’. what is its kinetic energy if its velocity is doubled?

Q.

Why is Kinetic Energy a Scalar Quantity?

Q.

A light and a heavy object have the same momentum. Which one of the following statements are correct regarding the kinetic energy of these two objects?

1. There is no relation between their kinetic energies

2. $(K.E{)}_1>(K.E{)}_2$

3. $(K.E{)}_1=(K.E{)}_2$

4. $(K.E{)}_1<(K.E{)}_2$

Q.

A sparrow and a crow are having the same kinetic energy during a flight. Which of the two is moving fast and why?

Q.

What are the conclusions made from the kinetic energy formula?

Q. Photons r particles that have energy ... That have velocity ...do they posses mass?

Q. A heavy and a light object have the same momentum. Which one has a larger kinetic energy?

1. Heavier object
2. Both are equal
3. Lighter object
4. Cannot be determined

Q. A ball whose kinetic energy is $E$, is thrown at an angle of $45$ with the horizontal, its kinetic energy at the highest point of its flight will be :

1. Zero
2. $E$
3. $\frac{E}{\sqrt{2}}$
4. $\frac{E}{2}$

Q. A light and a heavy body have equal momentum. Which one has greater kinetic energy?

1. The light body
2. Both have equal K.E.
3. Data given is incomplete
4. The heavy body

Q. A car covers 90 km in 60 min, and a truck covers 54 km in the same period of time. The linear momentum of the truck is $15\times {10}^3$ kg m/s. The mass of the car is 500 kg.

The ratio of the kinetic energy of the car to the kinetic energy of the truck is:

[1 mark]

1. 25:18
2. 5:9
3. 18:25
4. 9:5

Q. If the units of ML are doubled, then the unit of kinetic energy will become :

1. 8 times
2. 4 times
3. 2 times
4. 16 times

Q. Complete the following sentence:
The kinetic energy of a body is the energy by virtue of its______ .

1. force
2. roughness
3. all the above
4. motion

Q. For the same kinetic energy, the momentum shall be maximum for which of the following particle?

1. Proton
2. Electron
3. Alpha particle
4. Deuteron