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In the overhead view of Fig. 9-54, a 300 g ball with a speed v of 6.0 m/s strikes a wall at an angle ? of 30° and then rebounds with the same speed and angle. It is in contact with the wall for 10 ms. In unit-vector notation, what are
(a) the impulse on the ball from the wall and
(b) the average force on the wall from the ball?
Cheetahs, fastest of the great cats, can reach 45 in 2 starting from rest. Assume that they have constant acceleration throughout that time, find their acceleration (in (a) and (b) ) and the distance (in (c) and (d) ) Q2. They travel during that t..
A circular loop in the plane of the screen lies in a 0.60 T magnetic field pointing into the screen. The loop's diameter changes from 18.5 cm to 6.0 cm in 0.50 s.
A factory worker pushes a crate of mass 32.0kg a distance of 4.85 along a level floor at constant velocity by pushing horizontally on it. How much work is done on the crate by friction
The tension in the horizontal towrope pulling a water-skier is 240 N, How much work does the towrope do on the water-skier
Calculate the fast neutron flux needed to produce the same injury as 0.50 mSv/hr of thermal neutrons, and then, as 6,000 thermal neutrons per sq. cm per sec.
A 3 kg block initially traveling at 5 m/s collides with a 1 kg block (initially at rest) sitting near the base of a hill. how high up the hill do the two blocks slide after the collision
A small blimp is used for advertising purposes at a football game. It has a mass of 86.6 kg and is attached by a towrope to a truck on the ground. how much work is done by the truck in pulling the blimpb
A flywheel in the form of a uniformly thick disk of radius 1.23 m, has a mass of 45.1 kg, Calculate the constant torque required to stop it in 1.25 min
Two identical 1.3-kg blocks are connected by a massless string over a frictionless pulley of radius R = 15.000 cm and rotational inertia I = 0.004 kg m2, find the magnitude of the linear acceleration of the two blocks
A 500 g solid disk roles down an inclined plane 1 m long elevated by 10 cm. What is the kinetic energy of the disk at the bottom of the plane
A spherical source radiates sound uniformly in all directions. At a distance of 13 m, the sound intensity level is 80 dB. What power is radiated by this source
How much work must be done on the electron to move it to negative plate if it is initially positioned 2.86 mm from the positive plate.
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