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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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A spotlight on a boat is a = 2.1 m above the water, and the light strikes the water at a point that is x = 7.8 m horizontally displaced from the spotlight (see the drawing). The depth of the water i
A 64-cm diameter wheel accelerates uniformly about its center from 130 rpm to 280 rpm in 4.0s. Determine the angular acceleration and the radial and tangential components of the linear acceleration
A heavy ball with a weight of 120 is hung from the ceiling of a lecture hall on a 4.8--long rope. The ball is pulled to one side and released to swing as a pendulum, reaching a speed of 5.3 as it p
Calculate the p.d. across the parallel capacitors and the energy stored in the capacitors before AND after being connected in parallel. Explain the difference.
A projectile is launched straight up at 141 m/s. How fast is it moving at the top of its trajectory? Suppose it is launched upward at 45 degrees above the horizontal plane. How fast is it moving at
The light reflected from a film as in (a) is analysed with a spectrometer. What are the orders of interference of the two minima involved?
A pitcher throws a 0.164-kg baseball, and it approaches the bat at a speed of 56.6 m/s. The bat does 68.3 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the bal
You set two parallel slits 0.2 mm apart at a distance of 1 m from a screen. The distance between the first and second dark lines of interference pattern on the screen is?