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A bullet with mass m and speed v is fired at a ballistic pendulum bob of mass M. The bob is attached to a thin, light rod of length L, hangs vertically initially, and is attached to a pivot at its top end. A) Find v so that the rod swings up and is horizontal at the maximum height of the bob. B) Find the minimum v so that the rod will make a complete circle. C) Find v so that the tension in the rod is zero at the top of its swing.
Compute the mass of a ball and speed of a puck after collision.
A person who weighs 68 kg steps onto a spring scale in the bathroom, and spring compresses by 0.79cm. (a) what is the spring constant? (b) What is the weight of another person who compresses the spring by 0.34cm.
Two charges, -15 and +3.7 µC, are fixed in place and separated by 2.8 m. (a) At what spot along a line through the charges is the net electric field zero? Locate this spot relative to the positive charge. (Hint: The spot does not necessarily lie b..
An adventurous archaeologist crosses between two rock cliffs. If the angle between the rope and the horizontal is = 11.8, find out the tension in the rope.
A motorist travelling at 82 km/hr is being chased by a police car at 131 km/hr. If the police car starts from 3.5 km back, how long does it take to catch the motorist? Leave time in hours.
A 10.0g bullet is fired horizontally into a 101g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 141 N/m. The bullet becomes embedded in the block. If bullet-block system co..
How fast (in ) must a centrifuge rotate if a particle 5.4 from the axis of rotation is to experience the acceleration of 300000 's.
What is the greatest distance foot of the ladder can be placed from the base of the wall without the ladder immediately slipping.
A 6 kg block slides along a frictionless horizontal surface. The block is acted on by two forces, a 4.5 N force to the left, and a 7.5 N force to the right. At what rate is the 4.5 N force doing work on the block at the instant when its speed is 4..
A charge of -2.6 × 10-9 C is at the origin and a charge of 8.1 × 10-9 C is on x-axis at x = 3 m. At what two locations on the x-axis (xpositive, xnegative) is the potential zero.
An average force of 201 N is exerted to draw the string back 1.3 m. unless otherwise directed, imagine that air resistance is negligible. Illustrate energy bar graphs to solve the difficulty .
An emf is induced in a conductin loop of wire 1.03 m long as its shape is changed from square to circular. Find the average magnitude of the induced emf if change in shape occurs in 4.15s and the local 0.131-T magnetic field is vertical to the pla..
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