A ball starting from rest at the top of an inclined plane gains a speed of 2 m/s for each second it rolls. What is its acceleration down the incline?
A) 0.5 m/s2
B) 1 m/s2
C) 2 m/s2
D) 4 m/s2
Answer: C
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A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the mass is at the lowest point on the circle, the speed of the mass is 12 m/s. What is the magnitude of the force of the string on the mass at this position?
a. 31 N b. 36 N c. 41 N d. 46 N e. 23 N
A statue that is 2.3 cm tall is placed 15 cm in front of a convex mirror. The magnitude of the radius of curvature of the mirror is 18 cm
(a) Is the image real or virtual? (b) How far is the image from the mirror? (c) Is the image upright or inverted? (d) How tall is the image?
The neap tide can occur at the ________ or ________ phases of the Moon
Fill in the blank(s) with correct word
Which of these units of temperature is larger?
A) a Celsius degree B) a Kelvin C) both are the same size D) none of the above