Assignment:
1. Two Paths lead to the top of a big hill. One is steep and direct, while the other is twice as long but less steep. How much more potential energy would you gain taking the longer path?
A. The same
B. Twice as much
C. half as much
D. You gain no PE in either case.
2. A stone is thrown straight up. Compare its kinetic energy KE, to its potential energy GPE as it is going up.
A. KE increases and GPE decreases
B. KE decreases and GPE decreases .
C. KE increases and GPE increases
D. KE decreases and GPE increases
3. A mass attached to a vertical spring causes the spring to stretch and the mass to move downwards. What can you say about the springs potential energy (EPE) and the gravitational potential energy (GPE) of the mass
A. both EPE and GPE decrease
B. EPE increases and GPE decreases
C. both EPE and GPE increase
D. EPE decreases and GPE increases
4. A marble is placed in a marble launcher. What can you say about the springs potential energy (EPE) and the kinetic energy (GPE) of the marble as the marble is being fired from the launcher.
A. both EPE and KE decrease
B. EPE increases and KE decreases
C. both EPE and KE increase
D. EPE decreases and KE increases