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Question1
Consider a thin rod of mass 1.4 kg, length 2.7 m and uniform density. The rod is pivoted at one end on a frictionless horizontal pin. The rod is at first held in horizontal position however eventually allowed to swing down. What is its angular acceleration at instant it makes an angle 68 ? with the horizontal? The acceleration because of gravity is 9.8 m/s 2. Answer in units of rad/s 2
Question2
A ball is thrown toward a cliff of height (h) with a speed of 30m/s and an angle of 60 degrees above horizontal. It lands on the edge of the cliff 4.0s later.
a) How high is the cliff?
b) What was an utmost height of the ball?
c) What is ball's impact speed?
Question3
When a guitar string is sounded along with a 436 Hz tuning fork, a beat frequency of 5.00 Hz is heard. While the same string is sounded along with a 434 Hz tuning fork, the beat frequency is 7.00 Hz. What is frequency of the string?
A solid, frictionless cylindrical pulley with a mass of 3kg and a 0.420 m radius is used to draw water from a well. A 1.50kg bucket is attached to a cord that is wrapped around the pulley. If the bucket starts from rest at the top of the well and ..
At one instant, a 19.0-kg sled is moving over a horizontal surface of snow at 5.00 m/s. find the magnitude of the average friction force acting on the sled while it was moving
The winner of the competition wants to know if he has broken the world record for the break shot of 32mph (about 14.3m/s). The ball landed a distance 5.15m away from the table edge, calculate his break shot speed. At what speed did his pool shot h..
Estimate the force exerted on your fingertip if you place it at this point. Assume area of the fingertip to be 1.4cm^2
A 10 g bullet traveling at 450m/s strikes a 8.0kg , 1.0-m-wide door at the edge opposite the hinge. What is the angular velocity of the door just after impact
A series RLC circuit has a peak current of 1.0 A with a frequency of 54 kHz. If the resistance of the circuit is 51 k??, determine the average power of the circuit
Calculate the amount Stansfield should report as net cash provided (used) by financing activities in its 2010 statement of cash flows. (Enter amount as positive.)
A crazy anti-textbook Pearson rep goes ape and tries to chop a 6.0 cm thick textbook in half to show you how books, what force did the book exert back while it was being cut
Two charges, -3.5?C and -4.4?C , are located at (-0.70m , 0) and (0.70m , 0), respectively. find the location of the point where the electric field is zero
The only force acting on a 2.7 kg canister that is moving in an xy plane has a magnitude of 2.7 N. The canister initially has a velocity of 3.0 m/s in the positive x direction, and some time later has a velocity of 7.4 m/s in the positive y direct..
Find the magnitude of the acceleration for an electron in a uniform electric field with a magnitude of 122 N/C.
A car crashes into a wall at 25 m/s and its contents are brought to rest in 0.1s. display that the average force exerted on a 75-kg test dummy by the seat belt is more than 18,000 N.
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