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Q. A wheel of diameter 5.8 cm has a 4.0-m cord wrapped around its periphery. Starting from rest, the wheel is given a constant angular acceleration of 4.9 rad/s2. How much time it will take for the cord to unwind?
Q. A man weighing 710 and a woman weighing 430 have the same momentum. What is the ratio of the man's kinetic energy to that of the woman?
A ball is thrown from the top of a building upward at an angle of 39degrees to the horizontal and with an initial speed of 24m/s. The ball is thrown at a height of 57 m above the ground and hits the ground 98.55 m from the base of the building. Wh..
The cable pulls horizontally on the box, and a 50.30 bag of gravel rests on top of the box. The coefficients of friction between the box and roof are shown. The system is not moving. Find out the friction force on the bag of gravel.
Establish the initial volume of the gas . What is the magnitude of normal force that each brake pad applies to the rim.
Assume that plane continues to fly with the similar velocity
An archer shoots an arrow horizontally at a target 12 m away. The arrow is aimed directly at the center of the target, but it hits 56 cm lower. What was the initial speed of the arrow.
The reflected sound is afterwards mixed with the transmitted sound, and 85 beats per second are detected. The speed of sound in body tissue is 1520m/s. compute the speed of the fetal heart wall at the instant this measurement is made.
Decide the speed with the rock is thrown
Two small metallic spheres, each of mass 0.20g, are suspended as pendulums by light strings from a common point.
During 5 successive 0.97 min intervals, a runner moves at the following constant speeds: 0.436 km/min, 0.250 km/min, 0.160 km/min, 0.160 km/min, and 0.320 km/min. calculate the total distance traveled and the average speed.
A 5.00--long ladder has mass 12.5 kg and is leaning against a frictionless wall, making a 64 degree angle with the horizontal. If the coefficient of friction between the ladder and ground is 0.42, what is the mass of the heaviest person who can safel..
A u-tube with constant cross section is partly filled with water. Engine oil of density 0.8g/cm3 is poured into the right arm (without mixing) until the water level rises 2.0cm. The length of the oil column is then.
The acceleration of gravity is 10 m/s2. What is the acceleration of a 39 kg pail of cement that is pulled upward (not sideways) with a force of 421 N? Answer in units of m/s2.
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