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Q1. A 60 kg circus performer jumps from a 6.2 m height onto a trampoline and stretches it downward 0.36 m. Assume that the trampoline obeys Hooke's law.
a) How far would it stretch if the performer jumps from a height of 7.6 m?
b) How far would the trampoline stretch if performer stands still on it while taking a bow?
Q2. An electric motor rotating a workshop grinding wheel at a rate of 9.00x10^1 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.80 rad/s2. (a) How long does it take for the grinding wheel to stop? (b) Through how many radians has the wheel turned during the interval found in (a)?
What is the total force and the absolute pressure on the bottom of a swimming pool 22m by 8.5 m whose uniform depth is 2 m
Three point charges are arranged at the corners of a square, with charge -Q on both the particle at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the lower left corner.
A 4.5-kg, three legged stool supports a 68-kg person. If each leg of the stool has a cross-sectional diameter of 3.0 cm, determine the pressure exerted on the floor by each leg
The escape speed of a particular planet with a radius of 8.600e+6 m is 14,500 m/s. What is the mass of the planet
A 0.058 kg aluminum bullet traveling at 481 m/s strikes an armor plate and comes to a stop. what is the bullet's temperature change in degrees Celsius
Initially stationary (the train starts at rest), a train has a constant acceleration of 0.6 m/s2, What is its speed after 21 s
A certain cable car is San Francisco can stop in 10 s when traveling at maximum speed. how far was the car from the dog
You are consulting for an amusement park that wants to build a new "Rotor" ride. What must be the angular speed in revolutions per minute
If two successive overtones of a vibrating string are 420 Hz and 480 Hz, what is the frequency of the first overtone
A 860 ? resistor is connected to a variable-voltage power supply. What current flows in the resistor when the voltage is 15 V?
A full cylinder has an absolute pressure of 1.9 107 Pa when the temperature is 300 K. Find out the mass of oxygen in the cylinder.
An object is located at -3 cm. If its maximum oscillation amplitude 9cm what is the phase constant in radius
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