Q: An advertisement claims that a particular automobile can “stop on a
An advertisement claims that a particular automobile can “stop on a dime.” What net force would be necessary to stop a 850-kg automobile traveling initially at 45.0 km/h in a distance equal to the dia...
See AnswerQ: The fastest pitched baseball was measured at 46 m/s.
The fastest pitched baseball was measured at 46 m/s. A typical baseball has a mass of 145 g. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0 m, (a) what...
See AnswerQ: The fastest served tennis ball, served by “Big Bill”
The fastest served tennis ball, served by “Big Bill” Tilden in 1931, was measured at 73.14 m/s. The mass of a tennis ball is 57 g, and the ball, which starts from rest, is typically in contact with th...
See AnswerQ: Two crates, one with mass 4.00 kg and the
Two crates, one with mass 4.00 kg and the other with mass 6.00 kg, sit on the frictionless surface of a frozen pond, connected by a light rope (Fig. P4.39). A woman wearing golf shoes (for traction) p...
See AnswerQ: Two blocks connected by a light horizontal rope sit at rest on
Two blocks connected by a light horizontal rope sit at rest on a horizontal, frictionless surface. Block A has mass 15.0 kg, and block B has mass m. A constant horizontal force F = 60.0 N is applied t...
See AnswerQ: To study damage to aircraft that collide with large birds, you
To study damage to aircraft that collide with large birds, you design a test gun that will accelerate chicken-sized objects so that their displacement along the gun barrel is given by x =(9.0 × 103 m>...
See AnswerQ: A 6.50-kg instrument is hanging by a vertical
A 6.50-kg instrument is hanging by a vertical wire inside a spaceship that is blasting off from rest at the earth’s surface. This spaceship reaches an altitude of 276 m in 15.0 s with constant acceler...
See AnswerQ: The froghopper (Philaenus spumarius), the champion leaper of the insect
The froghopper (Philaenus spumarius), the champion leaper of the insect world, has a mass of 12.3 mg and leaves the ground (in the most energetic jumps) at 4.0 m>s from a vertical start. The jump itse...
See AnswerQ: A loaded elevator with very worn cables has a total mass of
A loaded elevator with very worn cables has a total mass of 2200 kg, and the cables can withstand a maximum tension of 28,000 N. (a) Draw the free-body force diagram for the elevator. In terms of the...
See AnswerQ: “A ball is thrown from the edge of a high cliff
“A ball is thrown from the edge of a high cliff. Regardless of the angle at which it is thrown, due to air resistance, the ball will eventually end up moving vertically downward.” Justify this stateme...
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