A rubber ball bounces off of a wall with an initial speed v and reverses its direction so its speed is v right after the bounce
As a result of this bounce, which of the following quantities of the ball are conserved? (There could be more than one correct choice.) A) the kinetic energy of the ball
B) the momentum of the ball
C) both the momentum and the kinetic energy of the ball
D) None of the above quantities are conserved.
A
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The distance between two successive ‘like' points on a wave is the wave's
a. speed b. frequency c. wavelength d. amplitude e. loudness
At room temperature (20.°C) the area of a hole in a sheet of material is 5.505 cm2. When heated to 830.°C the area increases by 29.0 mm2
(a) What is the thermal coefficient of linear expansion for the material? (b) If the temperature had decreased to -76.° Fahrenheit, what would be the area of the hole?
Components: When rolled down a mountainside at 7.0 m/s, the horizontal component of its velocity vector was 1.8 m/s. What was the angle of the mountain surface above the horizontal?
A. 75° B. 57° C. 33° D. 15°
Impulse: A batter applies an average force of 8000 N to a baseball for 1.1 ms. What is the magnitude of the impulse delivered to the baseball by the bat?
Fill in the blank(s) with the appropriate word(s).