Calculating mass when velocity and kinetic energy is given
Answers
KE=12mv2
Where:
KE = kinetic energy
m = mass of a body
v = velocity of a body
Kinetic Energy
Kinetic Energy is the energy an object has owing to its motion. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.
Answer:
Explanation: I explain it with an example.
a body has K.E 150j and moving with velocity 5m/s find mass(M) of the body.
We know K.E = 1/2Mv'2
Now, K.E= 150j (given)
v = 5m/s(given)
Put the given value in formulae to obtain mass of that body
150j = 1/2*M*(5m/s)'2
150j = 1/2*M*25m'2/s'2
by cross multiply
150*2j =25M*M'2/S'2
300kgm'2/s'2 = 25Mm'2/s'2
cancelling m'2/s'2 both side
Now, 300kg =25M
M= 300kg/25
M= 12kg