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A 400 g baseball thrown by a velocity of 40 m/s is hit straight back at the pitcher with a velocity of -50m/s. What is the change in momentum of the ball? What is the impulse exerted on the ball with the bat?
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 6.6m/s. Neglect frictional losses. Find the translational speed of the frozen juice can when it reaches the bottom
Find the ratio of the magnitude of the gravitational force between a 3.100 kilogram mass on the surface of the earth due to the sun to that due to the moon
The left ventricle of the heart accelerates blood from rest to avelocity of +27cm/s. If the displacement of the blood during the acceleration is +1.8 cm, determine its acceleration (incm/s2).
a fugitive tries to hop on a freight train traveling at a constant speed of 5.0 ms. just as an empty box car passes him
Light is incident at an angle of 43 degrees on the surface ofa dimond. Find the angle of refraction
A 170 object is taken to a height of 360 above the Earth's surface. What is the object's weight at this height
The mass of a star is 1.49 x 1031 kilogram and it performs one rotation in 38.7 days. Determine the force exerted on your fingertip
A laser beam passes during a converging lens with a focal length of 10 cm. At what distance past the lens has the laser beams (a) intensity and (b) electric field strength increased with a factor of 4?
In a tornado or hurricane, a roof may tear away from the house because of a difference in pressure between the air inside and the air outside. What is the magnitude of the force on the roof
q1. determine the tension in each cable if the boat has a mass of 490 kg and the angle of each cable is 50 degrees from
A w1 = 250 N bucket is lifted with an acceleration of a = 2.20m/s^2 by a w2 = 115N uniform vertical chain. Find the tension in the bottom link of the chain
An iron casting containing a number of cavities weighs 6500.0 N in air and 3500.0 N in water. What is the volume of the cavities in the casting
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