a car is moving at 12 m/s and has a mass of 600 kg. what is the kinetic energy of the car? a)36,300 b)42,200 c)72,600 d)86,400
Formula of Kinetic energy:
ke = 1/2 mass velocity²
mass = 600 kg
velocity = 12m/s
ke = 1/2 600 (12)²
ke = 1/2 600 144
ke = 1/2 * 86,400
ke = 43,200
The kinetic energy of the moving car is 43,200 joules.
Answer:
The kinetic energy of the car is, 43,200 kgm/s
Step-by-step explanation:
Using the formula:
\(K.E = \frac{1}{2}mv^2\) ....[1]
where,
K.E is the Kinetic Energy
m is the mass
and v is the velocity.
As per the statement:
a car is moving at 12 m/s and has a mass of 600 kg.
⇒m = 600kg and v = 12m/s
Substitute these given values in [1] we have;
\(K.E = \frac{1}{2} \cdot 600 \cdot 12^2\)
⇒\(K.E = \frac{1}{2} \cdot 600 \cdot 144\)
⇒\(K.E = \frac{1}{2} \cdot 86400\)
Simplify:
⇒\(K.E = 43,200\) kgm/s
Therefore, the kinetic energy of the car is, 43,200 kgm/s