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A 50 kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar 1.0 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
For a damped oscillator with a mass of 320g, a spring constant 82N/m and a damping coefficient of 71g/s, what is the ratio of the amplitude of damped oscillations to the initial amplitude at the end of 28 cycles.
A 3-kg steel ball strikes a wall with a speed of 13-m/s at an angle of 60.0° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.20s, what is the average force exerted by the wall on the..
A speaker and two microphones are arranged inside a sealed container filled with neon gas. What is the speed of sound in neon gas
A mail bag with a mass of 120 is suspended by a vertical rope of length 8.00. How much work is done by the worker in moving the bag to this position
Calculate the absolute pressure at an ocean depth of 75 m. Assume the density of sea water is 1 028 kg/m3 and the air above exerts a pressure of 101.3 kPa
The mean free path of nitrogen molecules at 10°C and 1.6 atmis 0.293 x 10-5cm. What is the molecular diameter
A heavy ball with a weight of 100N (m= 10.2 kg) is hung from the ceiling of a lecture hall on a 4.5-m-long rope. What is the tension in the rope at that point
A 50 kg woman jumps straight into the air, rising 0.8m from the ground. What impulse does she receive from the ground to attain this height
A homemade electroscope has 2 pieces of straw hanging from 2strings dangling from a hook. The length of the string fromtop to bottom on one side is 8 cm. When charged, the strawsstay 2 cm apart. The mass of one of the straws is .08 grams.
A helium atom (m= 6.6465 x 10^-27 kg) collides elastically with an oxygen atom (m = 2.6560x10^26kg) at rest. Find the speed of the oxygen atom
What is the jet's acceleration and what is the jet's speed after it accelerates for 6 s - What is the net force on the motorcycle
During a solar eclipse, the Moon, Earth, and Sun all lie on the same line, with the Moon between the Earth and the Sun. What force is exerted by the Sun on the Earth
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