Question

Julie is cycling at a speed of 3.4 meters/second. If the combined mass of the bicycle and Julie is 30 kilograms, what is the kinetic energy?

Answer 1

Velocity=3.4m/sec
Mass=30kg
so kinetic energy=1/2mv^2
=1/2×30×3.4×3.4
=15×3.4×3.4
=15×11.56
=173.4 kg m per second square

Answer 2

Answer: 173.4 Joules

Explanation: Kinetic energy is the energy possessed by an object by virtue of its motion.

$K.E=\frac{1}{2}\times mv^2$

m= mass of object

v = velocity

$K.E=\frac{1\times 30kg\times (3.4ms^{-1})^2}{2}=173.4kgm^2s^{-2}=173.4J$

$(1kgm^2s^{-2}=1Joule)$