1.358 J is the kinetic energy of the car driven by Mrs. Waid.
<u>Explanation:</u>
Given data:
Velocity at which Mrs. Waid drives her car = 80 mph
In order to convert mph (meter per hour) into mps (meter per second),

Car weighs 2500 lbs, means mass of the car, m = 2500 lbs
I kilo gram = 2.20462 pound
Therefore, 1 pound (lb)= 0.45359237 kilograms (kg).
To converting pounds into kilogram,

As we know, the kinetic energy can be defined as directly proportionate to the object’s mass (m) and square of its velocity (v). The expression can be given as below,

By substituting the given values, we get



Answer:
The kinetic energy decreases, and gravitational potential energy increases.
Explanation:
The rollercoaster will slow down as it goes up the hill, so kinetic energy should not increase.
Answer:
The answer is gravitational force
Explanation:
The answer is B. The electric screw driver increased the work. You would rather have an electric one than doing it all by hand. Hope this helps!