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A hot-air balloon is rising straight up with a speed of 4.4 m/s. A ballast bag is released from rest relative to the balloon when it is 7 m above the ground. How much time elapses before the ballas
Two students use a 40 HZ tape timer to measure the time of fall of a ball from a height. they count 239 dots on the tape. what is the time of fall of the ball?
A vertical spring with a spring constant of 480 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.15-kg block is dropped from rest. It collides with and sticks to
Two electric dipoles with charges +/-Q on the left attached to each to other by a rigid rod, and the two charges on the right are also rigidly attach to each other, find the electric force?
An athlete whose mass is 85.0 is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 580 . He lifts the barbell a dista
A 1.00 g lead bullet at 24.0°C is fired at a speed of 280 m/s into a large block of ice at 0°C, in which it becomes embedded. What quantity of ice melts?
A uniform cylinder with radius 20 cm has been attached to two cords and the cords are wound around it and hung from the ceiling. the cylinder is released from rest and the cords unwind as the cylind
A car with a rectangular size of 6.00 m by 3.00 m is traveling along a dry gravel roadway sloping downward at 7.0°. Determine the electric flux through the bottom of the car.
A soccer player kicks a ball with an average force of +1400 N, and her foot remains in contact with the ball for a time of 7.6 10-3 s. What is the impulse (magnitude and direction) of this force?
The first person is initially moving forward with a speed of 2.20 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregar
What was the minimum possible difference in distances of the two mirrors from the beamsplitter in the original setup, assuming that the path difference was not actually zero?
A bullet of mass 0.0017 kg moving at 581 m/s impacts a large fixed block of wood and travels 5.9 cm before coming to rest. Assuming that the acceleration of the bullet is constant, find the force e
Bonnie and Clyde are sliding 400 {rm kg} bank safe across the floor to their getaway car. What is the safe's coefficient of kinetic friction on the bank floor?
For a damped oscillator with a mass of 360 g, a spring constant 110 N/m and a damping coefficient of 87 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude a
Two positive point charges are 7.0 cm apart. If the electric potential energy is 80 microjoules, what is the magnitude of the force between the two charges?
A w=1885-N crate hangs from from the far end of the beam. Find the magnitude of horizontal and vertical components of the force that the wall exerts on the left end of the beam.
Find (a) the tension in the support cable and (b) the magnitude of the force exerted on the lower end of the boom by the hinge at point P.
The barbell spins with angular speed ω = 50 radians/s. what is the rotational kinetic energy.
Determine the rotation rate, in revolutions per second, required to give an astronaut a centripetal acceleration of 3.36g while in circular motion with radius 9.16 m.
One wire carries a current into it. another wire carries a current out of it. how long would it take for the sphere to increase in potential by 800v?
A force that varies linearly with time according to a relation F = 4t N is applied to an object traveling with a speed of 16m/s. If the force decelerates the object to a complete stop in 5s, determ
To start the elevator moving, it must be accelerated at {textstyle{1 over 8}},g. What must be the angular acceleration of the disk, in {rm{rad/s}}^2?
A barefoot field-goal kicker imparts a speed of 26 m/s to a football initially at rest. If the football has a mass of 0.24 kg and the If the football has a mass of 0.24 kg and the time of contact wi
The acceleration of a ball as it rolls down a ramp is 4 m/s^2. 2 s after it starts to roll, what is the velocity acquired after starting from rest in m/s ?
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