Advertisements
Advertisements
प्रश्न
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
Advertisements
उत्तर
We know that momentum p = mass × velocity
Let m1, m2 be the mass of two bodies having velocity v1, v2
∴ Their momentum is m1 v1 and m2 v2
Since m1 v1 = m2 v2 (given),
If m1 < m2, v1 > v2
∴ Kinetic Energy of lighter mass is greater.
Since K.E = `1/2 mv^2`
APPEARS IN
संबंधित प्रश्न
Name the type of energy (kinetic or potential) possessed by the following:
Water flowing in a river.
What is meant by the renewable and non-renewable sources of energy? Distinguish between them giving two examples of weach.
Select the renewable and non-renewable sources of energy from the following:
Diesel
Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.
A ball of mass 0.5 kg slows down from a speed of 5m/s-1 to that of 3m/s-1. Calculate the change in kinetic energy of the ball.
What do you understand by mechanical energy?
What do you understand by the kinetic energy of the body?
Write the type of energy possessed in the following case:
A bent bow
Give one example when:
Kinetic energy changes to heat energy.
Nuclear fission is
