# Problem: Which of the following objects has the greatest kinetic energy?(a) a 500-kg motorcycle moving at 100 km/h (b) a 1,000-kg car moving at 50 km/h(c) a 1500-kg car moving at 30 km/h (d) a 5000 kg truck moving at 10 km/h (e) a 10,000-kg truck moving at 5 km/h

###### FREE Expert Solution

Kinetic Energy (K.E.)

$\overline{){\mathbf{K}}{\mathbf{.}}{\mathbf{E}}{\mathbf{.}}{\mathbf{=}}\frac{\mathbf{1}}{\mathbf{2}}{\mathbf{m}}{{\mathbf{v}}}^{{\mathbf{2}}}}$

Ekinetic energy = J
m = mass, in kg
v = velocity of the e- = m/s

(a) a 500-kg motorcycle moving at 100 km/h

$\frac{\mathbf{k}\mathbf{g}\mathbf{·}{\mathbf{m}}^{\mathbf{2}}}{{\mathbf{s}}^{\mathbf{2}}}{\mathbf{=}}{\mathbit{J}}$

K. E. = 385802 J

(b) a 1,000-kg car moving at 50 km/h

$\frac{\mathbf{k}\mathbf{g}\mathbf{·}{\mathbf{m}}^{\mathbf{2}}}{{\mathbf{s}}^{\mathbf{2}}}{\mathbf{=}}{\mathbit{J}}$

K. E. = 192901 J

94% (129 ratings) ###### Problem Details

Which of the following objects has the greatest kinetic energy?

(a) a 500-kg motorcycle moving at 100 km/h

(b) a 1,000-kg car moving at 50 km/h

(c) a 1500-kg car moving at 30 km/h

(d) a 5000 kg truck moving at 10 km/h

(e) a 10,000-kg truck moving at 5 km/h

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Kinetic & Potential Energy concept. You can view video lessons to learn Kinetic & Potential Energy. Or if you need more Kinetic & Potential Energy practice, you can also practice Kinetic & Potential Energy practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Windman's class at MC MARICOPA.