Answer:

Explanation:
The equation for force is given:

First, we must find the total mass, which is the sum of the boy's mass and the go-cart's mass.
- total mass= boy's mass + go cart's mass
The boy's mass is 35 kilograms and the go cart's is 65 kilograms.
- total mass= 35 kg+ 65 kg=100 kg
Now we know the total mass and the acceleration.

Substitute the values into the formula.

Multiply.

- 1 kilograms meter per square second is equal to 1 Newton.
- Our answer of 500 kg*m/s² is equal to 500 Newtons.

The force exerted by the go cart engine is <u>500 Newtons.</u>
Answer:
Explanation:
Relative to ground level it has
PE = mgh = 8(10)(5) = 400 J
Input energy is: 200 joule
Output energy is: 100 joule
100/200*100=%50 efficiency
Answer:
15? I actually don't know
Answer:
The frequency of the photon is
.
Explanation:
Given that,
Energy
We need to calculate the energy
Using relation of energy

Where,
= energy spacing


Put the value of h into the formula


Hence, The frequency of the photon is
.