Nellie Newton pulls her sled by a rope that is 45° to the horizontal. The horizontal and vertical components of force are
A) equal in magnitude.
B) each about 0.7 times the force she exerts on the rope.
C) both of these
D) neither of these
Answer: C
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Fill in the blank(s) with the appropriate word(s).
Picnickers see a lightning flash of an approaching thunderstorm and hear the thunder 8.0 s later
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A wheel rotates about a fixed axis with a constant angular acceleration of 4.0 rad/s2 . The diameter of the wheel is 40 cm. What is the linear speed of a point on the rim of this wheel at an instant when that point has a total linear acceleration with a magnitude of 1.2 m/s2?
a. 39 cm/s b. 42 cm/s c. 45 cm/s d. 35 cm/s e. 53 cm/s
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