Suppose you kick a soccer ball straight up to a height of 10 meters. Which of the following is true about the gravitational potential energy of the ball during its flight?
A) The ball's gravitational potential energy is greatest at the instant it returns to hit the ground.
B) The ball's gravitational potential energy is greatest at the instant when the ball is at its highest point.
C) The ball's gravitational potential energy is always the same.
D) The ball's gravitational potential energy is greatest at the instant the ball leaves your foot.
B
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A sprinter moving at 10 m/s slows down at a rate of 1.4 m/s2. How fast is the runner moving after 4 seconds?
A. 5.8 m/s B. 15.6 m/s C. 0 m/s D. 4.4 m/s
If a planet has a radius 16.0% greater than that of the Earth but has the same mass as the Earth, what is the acceleration due to gravity at its surface?
a. 8.45 m/s2 b. 1.57 m/s2 c. 10.0 m/s2 d. 7.28 m/s2
If you take a given pendulum to the Moon, where the acceleration of gravity is less than on Earth, the resonant frequency of the pendulum will
A) increase. B) decrease. C) not change. D) become zero. E) either increase or decrease; it depends on its length to mass ratio.
If in a double-slit experiment the slit separation is increased, which of the following happens to the interference pattern shown on the screen?
A) The minima get closer together. B) The maxima stay at the same position. C) The minima and maxima stay at the same position. D) The minima stay at the same position. E) The maxima get further apart.