Question

A toy car of mass 200 g moves with a speed of 36 km/h. Find the kinetic energy
possessed by the moving car.

Answer 1

Answer:

10J

Explanation:

Kinetic energy is 0.5 mass x velocity^2.

Velocity needs to be in m/s so 36/3.6= speed in m/s =10m/s.

Mass needs to be in Kg so 0.2 Kg = mass.

0.5x0.2x10^2=10J of kinetic energy.

Hope this helps.

Answer 2

Answer:

10 Joules

Explanation:

Given, m = 200g = 0.2kg

           v = 36 km/h = 10 m/s

$K_e = \frac{1}{2} mv^2$

$K_e = \frac{1}{2}(0.2)(10)^2$

$K_e = \frac{1}{2}(0.2)(100)\\K_e = \frac{1}{2}(20)\\\\K_e = 10 J$

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