A 4kg mass moves with a velocity of 5m\s find the kinetic energy
k•E =1\2mv2
k•E=
=1\2×4×5×5
k•E=1×4×25÷2=50
looks good
Joules, right?
given:m=4,v=5,k.e=?we have k.e=0.1mv2 which is 0.5×4×25=50j
To find the kinetic energy of an object, you need to use the equation:
Kinetic Energy (KE) = (1/2) * mass * velocity^2
Given that the mass (m) is 4 kg and the velocity (v) is 5 m/s, we can substitute these values into the equation to find the kinetic energy:
KE = (1/2) * 4 kg * (5 m/s)^2
First, let's calculate the square of the velocity:
(5 m/s)^2 = 5 m/s * 5 m/s = 25 m^2/s^2
Now, substitute this value into the equation and solve for kinetic energy:
KE = (1/2) * 4 kg * 25 m^2/s^2
KE = 50 kg * m^2/s^2
So, the kinetic energy of the object is 50 joules (J).