a moving body of mass 20kg has 40 joules of kinetic energy. calculate its speed
Answers
Answered by
159
Given:
mass=20kg
K.E=40Joules.
velocity=V?
Formula:
K.E=1/2mV²
40=(1/2)*20V²
40=10V²
V²=4
V=2m/s
∴speed= 2m/s
mass=20kg
K.E=40Joules.
velocity=V?
Formula:
K.E=1/2mV²
40=(1/2)*20V²
40=10V²
V²=4
V=2m/s
∴speed= 2m/s
Answered by
57
Given,
Mass of a moving body (m) = 20 kg
Kinetic energy of a moving body (Ek) = 40 joules
Speed of a moving body (v) = ?
Calculation,
We know that, Ek = 1/2mv²
40 = 1/2 * 20 * v²
v² = (40 * 2) / 20
v² = 80 / 20
v² = 8 / 2
v² = 4 / 1
v = √4
v = 2 m/s
Speed = 2 m/s Ans.
Ans.) The speed of a moving body is 2 m/s.
Mass of a moving body (m) = 20 kg
Kinetic energy of a moving body (Ek) = 40 joules
Speed of a moving body (v) = ?
Calculation,
We know that, Ek = 1/2mv²
40 = 1/2 * 20 * v²
v² = (40 * 2) / 20
v² = 80 / 20
v² = 8 / 2
v² = 4 / 1
v = √4
v = 2 m/s
Speed = 2 m/s Ans.
Ans.) The speed of a moving body is 2 m/s.
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