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A 10kg hammer strikes a nail at a velocity of 8.1m/s and comes to rest in a time interval of 8.5ms . What is the impulse given to the nail? What is the average force acting on the nail?
A 100-kg halfback running north with a speed of 12 m/s is tackled by a 110-kg opponent running south with a speed of 4.0 m/s. If collision is completely inelastic and head-on, compute the speed of the players just after the tackle.
A model rocket engine has an average thrust of 5.26 N. It has an initial mass of 25.9 g, which includes fuel mass of 13.0 g. The duration of its burn is 1.90 s. find What is the average exhaust speed of the engine
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..
A solid, horizontal cylinder of mass 9.0 kg and radius 1.30 m rotates with an angular speed of 8.00 rad/s about a fixed vertical axis through its center. Determine the final angular speed of the system
at rest, a light source emits 532 nm light. as it moves along a line connecting it and Earth, observers on Earth measure the wavelength to be 412 nm. What is the sources velocity and direction? Were it to move in opposite direction at the same spe..
in the arctic polar bears must be able to walk on thin ice to travel and hunt for food. an average male polar bear has
A uniform electric field of magnitude 324 N/C is directed along the +y-axis. A 5.90 µC charge moves from the origin to the point (x, y) = (-20 cm, -35 cm). What is the change in the potential energy associated with this charge?
A heat engine with an efficiency of 20.0% performs 2500 J of work. How much heat is discharged to the lower temperature reservoir
Consider the following situation: you fire a tennis ball off theroof of a building of height h, with initial velocity magnitudev0 and angle θ. Show that the final velocitymagnitude with which the ball hits the ground is independent ofθ.
Three negative charges of equal magnitude q are placed along a straight line, Find the electrostatic force on middle (second) charge
An aluminum rod is 22.0 cm long at 20°C and has a mass of 350 g. If 14,000 J of energy is added to the rod by heat, what is the change in length of the rod
A bullet of mass 0.0025 kg moving at 581 m/s impacts a large fixed block of wood and travels 5.40 cm before coming to rest.
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