Author Question: A truck weighs twice as much as a car, and is moving at twice the speed of the car. Which statement ... (Read 19 times)

Charlie · **on:** Jul 27, 2018

A truck weighs twice as much as a car, and is moving at twice the speed of the car. Which statement is true about the truck's kinetic energy (K) compared to that of the car?

A) The truck has 4 times the K of the car.
B) All that can be said is that the truck has more K.
C) The truck has twice the K of the car.
D) The truck has 8 times the K of the car.
E) The truck has times the K of the car.

Question 2

The Cambrian Explosion began approximately

A) 2.1 billion years ago
B) 542 million years ago
C) 1.2 billion years ago
D) 65 million years ago