b) What type of energy will they have at the bottom of the hill and how much is
ID: 1284103 • Letter: B
Question
b) What type of energy will they have at the bottom of the hill and how much is there? c) With what speed will the person reach the bottom of the hill? 6. The acceleration due to gravity is on the Moon is approximately one-sixth the gravitational acceleration near the Earth's surface. If a rock is transported from Earth to the Moon, will either its mass or weight change? Explain. 7. The velocity a pendulum has as it goes through its lowest point is 4.0 m/s. To what height will the pendulum bob rise after it goes through the equilibrium position? 8. A toy gun uses a spring to launch a projectile. Assume there is no energy loss due to friction. If the spring constant (k) is 40 N/m, the marbles it launches are 0.01 kg each, and the distance the spring is compressed is 0.08 m, find a) The initial speed with which the marble leaves the gun, andExplanation / Answer
5 b
When they reach the bottom...they will have kinetic energy
The amount of kinetic energy is equal to potential energy stored = 7840 J
As person reaches bottom, PE get converted to KE
7840 = 0.5 x mv2
m=40kg
v= 19.8 m/s
6.If the rock is transported from earth to moon only the weight changes and not the mass as mass is the matter content of the body while weight is the gravitational force acting on the body.
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