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In serving, a tennis player accelerates at 56 kg tennis ball horizontally from rest to a speed of 30 m/s. Assuming that the acceleration is uniform when the racquet force is applied over a distance of .5 m, what is the magnitude of force exerted on the ball by the racquet?
Find out the magnitude of the electric field at a point P on the y-axis 0.529 m from the origin. The value of the Coulomb constant is 8.99 × 109 N • m2/C2.
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 1.8 rad/s2. (a) How long does it take the discus thrower's speed to get to 3.5 rad/s?
Two forces are the only forces acting on a 3.0 kg object whichmoves with an acceleration of 3.0 m/s2 in the positive y direction.If one of the forces acts in the positive x direction and hasmagnitude of 8.0 Newtons, what is the magnitude of the other..
A 70- kg child sits in a swing suspended with 3.3- m-long ropes. determine the speed the child will have at the bottom of the arc
Infrared light of wavelength 2.5 illuminates a 0.20-mm-diameter hole. What is the angle of the first dark fringe in rad, in deg? and sin (fi)=lambda/D is not the formula
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.9 m/s^2 for a height 61.0 cm. How much time does he have to get out of its way before it returns to the height of the top of his head, a ..
astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge take 20.0 seconds to reach top speed, what is the astronauts tangential acceleration during the first 20.0 s
Suppose a satellite is in a circular orbit 5.175 Earth radii above the surface of the Earth, By how much does it have to increase its speed
A block of wood floats on water. 80% of the wood is submerged in water. Now a layer of oil is carefully poured on top of the water to a depth that more than covers the block. what is the density of the oil
The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. Illustrate what is the conventional name of the vector you have drawn?
a fisherman is dozing when a fish takes the line and pulls it with a tension F the spool of the reel is at rest intialy, find the magnitude of the final angular velocity of the spool
A 20.0 kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole. A cable at an angle of 30.0 degrees with the beam helps support the light. Find (A) the vertical component of the force exerte..
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