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When starting a foot race, a 70.0-kg sprinter exerts an average force of 650 N backward on the ground for 0.800 s.
(a) What is his final speed?
(b) How far does he travel?
A 68.0 kg person escapes from a burning building by jumping from a window 25m above a catching net. Assuming that air resistance exerts a 95N force on the person during the fall, determine the person's velocity just before hitting the net.
An object is located 21.4 cm to the left of a diverging lens having a focal length f = -34.2 cm. Determine the magnification of the image
Suppose we hang a heavy ball with a mass m = 17 kg (so the weight is mg) from a steel wire 2.5 m long that is 2 mm in diameter (radius = 1e-3 m). Calculate the stretch L of the steel wire
A 2.0 kg object moving with a velocity of +6.0 m/s collides with a 6.0 kg object that is initially at rest. Find the energy lost in the collision.
Two particles with masses 2m and 3m are moving toward each other along the x axis with the same initial speeds vi. Find the final speeds of the two particles
a particle with mass 2.30 g and charge 10.0 c enters through a small hole in a metal plate with a speed of 8.50 ms at
q1. a very long non conducting cylinder of diameter 10.0 cm carries charge distributed uniformly over its surface. each
A 15 kg block is accelerated at 1.7 m/s2 up a frictionless plane inclined at 5.0° to the horizontal, find the change in the block's mechanical energy
Two students are on a balcony 19.2 m above the street. One student throws a ball vertically downward at 14.9 m/s; What is the velocity of each ball as it strikes the ground
At amusement parks, there is a popular ride where the floor of a rotating cylindrical room falls away, What is the source of the centripetal force acting on the riders
An orienter runs the following course: 100 m at 35 degrees, 150 m at 220 degrees, and 50 meters at 170 degrees. find the resultant displacement.
A diffraction grating has 2604 lines per centimeter, and it produces a principal maximum at θ = 30.0 °. What are the wavelengths of the incident light that could have produced this maximum
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