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A simple pendulum is made from a 0.617 m-long string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before it attains its greatest speed?
A cylinder rolls down a ramp of height h = 1.1 m with ? = 36°, starting from rest at the top. How long does it take to reach the bottom of the ramp
A seed shoots out from the pod with the speed of 2.6m/s but with a direction of motion 30° below the horizontal. The seed pod is initially 1.1m above the ground.
A rescue helicopter lifts a 70.8-kg person straight up by means of a cable. What is the tension in the cable
Two masses are joined by a massless string. A 27-N force applied vertically to the upper mass gives the system a constant upward acceleration of 3.5m/s^2. If the string tension is 19-N , what is the bigger of two masses
One of the problems of in-air testing of nuclear weapons (or, even worse, the use of such weapons!) is the danger of radioactive fallout. What percent of the original level of is left after 56 years
A 1100 kg car increases it speed from 40 km/hr to 60 km/hr in 5 seconds. What is the resultant work done on the car
You are standing 2.5 {rm m} straight in front of one of the two loudspeakers. They are 3 {rm m} apart and both are playing a 686 {rm Hz} tone in phase. As you begin to walk directly away from the speaker, at what distances from the speaker do you ..
Using the kinematic equation, prove that if two balls are released simultaneously from table, one with zero velocity and the other with a horizontal velocity, they would both reach the ground at the identical time.
Suppose that the charge on the electron and proton did not have the same magnitude but instead differed by one part in 10^10. What would be the net charge on a 1.0-kg sample of helium gas
If a loop of chain is spun at high speed, it can roll along the ground like a circular hoop without collapsing. consider a chain of uniform linear mass density ? whose center of mass travels to the right at a high speed Vo. Determine the tension in t..
The engineer takes 0.400 seconds to react, and then applies the brakes. At what rate must the passenger train then decelerate in order to avoid a collision?
What is the distance between the two traps?
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