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A barefoot field-goal kicker imparts a speed of 23 m/s to a football initially at rest. If the football has a mass of 0.24 kg and the time of contact with the ball is 0.031 s, what is the force exerted by the ball on the kicker's foot?
Air in a diesel engine cylinder is quickly compressed from an initial temperature of 20 °C, an initial pressure of 1 atm, find the final temperature and pressure
Suppose the coefficient of static friction between the road and the tires on a car is 0.575 and the car has no negative lift. What speed will put the car on the verge of sliding
A female gymnast weighs 700 N.Ifshe is hanging stationary from a high bar, how many forces are acting on her
A metal sphere centered at the origin has a surface charge density that has a magnitude of 24.1 nC/m2 and a radius less than 2.00 m. What is the sign of the charge on the sphere
A wheel rotates about a horizontal axis. It has an outerradius R1= 21.2 cm and mass M1=4.51 kg. what is the kinetic energy of the rotating wheel
A force, F(vector) =(2xˆ+3yˆ) N, is applied to an object at a point whose position vector with respect to the pivot point is r(vector) =(4xˆ+4yˆ+4zˆ) m
A particle is located at r=(4.1i+3.1j+5.6k)m . A force F=(9.5j-3.5k)N acts on it. What is the torque, calculated about the origin
An object is placed to the left of a convex lens and on the optical axis. evaluate the magnification of the image formed by the lens
The critical angle for a certain liquid-air surface is42.0°. What is the index of refraction of the liquid
what volume should the balloon have after being inflated. Billiard ball A of mass mA=0.400kg moving with speed vA=1.80m/s strikes ball B, initially at rest of mass mB=0.500kg. As a result of collision, ball A is deflected off at an angle of 30.0 deg..
Compute the volume charge density of the atmosphere, assuming it to be uniform between 300 and 450 m. (Hint: You may neglect the curvature of the earth. Why?)
A uniform 1.3-kg rod that is 0.86 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
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