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The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 46 m in a straight line, reaching a final speed of 89 km/h.
(a) Determine the cheetah's average acceleration during the short sprint.
(b) Find its displacement at t = 3.1 s. (Assume the cheetah maintains a constant acceleration throughout the sprint.)
A particle of mass "m" moves in a straight line with retardation proportional to its displacement. Find the expression for loss of KE for any displacement "x"
approximately what is the mass of an object whose weight equals the force from part "b"? can you lift such a mass.
Older freezers developed a coating of ice inside that had to be melted periodically; an electric heater could speed this defrosting process. What is the resistance of the wire
Wool is rubbed against a plastic ruler. If the plastic ruler acquires a charge of -5 µC, how many electrons have been transferred to the ruler
A 0.520kg glider on an air track is attached to the end of an ideal spring with force constant 453N/m; it undergoes simple harmonic motion with an amplitude of 4.10×10?2m. Compute the maximum speed of the glider
Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 10 s, it rotates 2 revolutions. What was the angular acceleration during this time
A rifle with a weight of 35 N fires a 3.0-g bullet with a speed of 230 m/s. Find the recoil speed of the rifle
The primary coil of an ideal transformer has 650 turns, and the secondary coil has 260 turns. Assume the primary coil carries 15 A at a voltage of 120 V. What is the output current of the secondary coil
a balloon contains 4.20 moles of a monatomic ideal gas. As energy is added to the system by heat, find work Wenv done by the gas in expanding the balloon
What is the velocity of observer B relative to observer A . A diver shines a light up to surface of a flat glass-bottomed boat at an angle of 36 relative to the normal.
In the Bohr model of hydrogen, the electron moves in a circular orbit around the nucleus. Determine the angular speed of the electron
computer chips are etched on circular cylinder wafers of thickness 0.60mm that are sliced from a solid cylindrical silicon crystal of length 30cm . If each wafer can hold 100 chips, what is the maximum number of chips that can be produced from one..
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