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A placekicker must kick a football from a point 36.0 m (about39.0 yd) fm the goal, and the ball must clear the crossbar, whichis 3.05 m high. When kicked the ball leaves the ground with avelocity of 22.0 m/s at an angle of 46.0 to the horizontal.
(a) By how much does the ball clear or fall short clearing thecrossbar?
(b) Does the ball approach the cross bar while still rising orwhile falling?
Rubber stopper attached to one end of the string and 100 g mass attached to the other end. A student gets the rubber stopper going in a horizontal circle above her head.
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 550 kg. Find the kinetic energy stored in the flywheel
q1. a skier is accelerating down a 30.0deg hill at a 4.50 ms2a what is the vertical component of her acceleration? ms2
What is the charge on negative electrode. Find out the wavelength.
A 5.25 kg ball of clay is thrown downward from a height of 2.79m with a speed of 4.41 m/s onto a spring with k=1530 N/m. The clay compresses the spring a certain maximum amount before momentarily stopping.
A thin 1.7-m metal rod sustanins a longitudinal standing wave with vibration antinodes at each end of the rod. What is the frequency of the rod's vibration
A horizontal force of 200N is applied to a 55kg cart by a child across a 10m level surface. The cart accelerates at 2m/s^2. What force of friction acts to retard the motion of the cart
A ball of mass 2.4 kg hangs at the end of a string 1.4 m in length from the ceiling of a room. What is the gravitational potential energy of the ball relative to the floor
An ideal gas initially at 20°C and 199 kPa has a volume of 3.40 L. It undergoes a quasi-static, Find the heat added to the gas during the expansion
In an atwood's machine, one block has a mass of .6kg and the other a mass of .56 kg. What is the direction of the net torque on the pulley
Two astronauts of equal mass 70 kg are holding on to opposite ends of a straight rope in space. The length of the rope between them is 14 meters. What is the new angular velocity of the two astronauts
A fast tortoise runs with a speed of 10.0 cm/s and a hare runs 20.0 times faster. They start a race together but the hare stops to rest for 2.00 minutes. What distance did the hare cover
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