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A 17-kg 3.6-m ladder is leaning against a frictionless wall with its base making an angle of horizontal. What is the magnitude of the force exerted on the ladder by the wall?
A ball is thrown straight up in the presence of gravity and quadratic air resistance (frictional force = -cv^2v~). Find the velocity as a function of height
A single mass m1 = 4.5 kg hangs from a spring in a motionless elevator. The spring is extended x = 15.0 cm from its unstretched length. find the force the bottom spring exerts on the bottom mass
A person is performing a knee extension exercise with a 100 N weight acting at the ankle. What is the torque at the knee necessary to maintain a knee joint angle of -60q relative to the right horizontal passing through the knee joint
A bullet moving horizontally with a speed of 500m/s strikes a sandbag and penetrates a distance of 10.0 cm. What is the average acceleration , in m/s^2, of the bullet
Two steel guitar strings have the similar length. String A has a diameter of 0.51 millimeter and is under 430 Newton of tension. Determine the ratio of the wave speeds
Amy and Jessie are on a camping trip near a river. Jessie is floating on an inner tube raft, What angle does Amy's boat have to make so that she can follow the path straight to the island
Two point charges have a value of 30 ?C each and are 4 cm apart. What is electric field at the midpoint between the two charges
A rigid body is rotating around the vertical z axis anticlockwise when look at from above. Calculate the tangential and normal components of the acceleration
An organ pipe is 1.42 m long. What is the first harmonic frequency of this pipe when it is open at both ends
Ray decides to paint the outside of his uncle's house. He uses a 4.0-m-long board supported by cables at each end to paint the second floor. find the force that the left cable exerts on the board
a motorcycle rider starts from rest and goes 3.75 rad counterclockwise around a circular track in 12.3 seconds.
A hockey puck with mass 0.160kg is at rest on the horizontal, frictionless surface of a rink. What is the position of the puck at the end of that time
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