find the kinetic energy of a bullet of mass 50 gram moving with a velocity 200 metre per second
Answers
Answered by
16
Given :
▪ Mass of bullet = 50g = 0.05kg
▪ Velocity of bullet = 200m/s
To Find :
▪ Kinetic energy of bullet.
Formula :
✒ Formula of kinetic energy in terms of mass of body and velocity of body is given by
☞ KE = (1/2)mv^2
- KE denotes kinetic energy
- m denotes mass
- v denotes velocity
Calculation :
→ KE = (1/2)mv^2
→ KE = (1/2)×0.05×(200)^2
→ KE = (0.5×0.05×40000)
→ KE = 1000J = 1kJ
Additional information :
- Kinetic energy is a scalar quantity.
- It has only magnitude.
- When force and displacement are in same direction, the kinetic energy of the body increase.
- The increase in KE is equal to the work done on the body.
- When force and displacement are in oppositely directed, the KE of the body decreases.
- The decrease in KE is equal to the work done by the body against the retarding force.
- When KE increases, the work done is positive and when KE decreases, the work done is negative.
- Kinetic energy can't be negative.
Answered by
22
Answer:-
Given:
Mass of the bullet (m) = 50 g = 50/1000 = 0.05 kg
Velocity (v) = 200 m/s
We know that,
Kinetic energy = 1/2 * mv²
→ Kinetic energy of the bullet = 1/2 *(0.05)(200)(200)
→ K.E of the bullet = 1000 kgm²/s²
→ K.E of the bullet = 1000 J.
Hence, the Kinetic energy of the bullet is 1000 J.
Similar questions