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A 150 g baseball is pitched at 50 m/s and is hit straight back at the pitcher at a speed of 60 m/s. What is the magnitude of the average force on the ball from the bat if the bat is in contact with the ball for 0.005 s?
for a science fair competition,a group of high school students build a kicker machine that can launch a golf ball from the origin with a velocity of 11.3 m/s, Where will the golf ball fall back to the ground
q1. driving in your car with a constant speed of 13 ms you encounter a bump in the road that has a circular cross
A rope applies a horizontal force of 193 N to pull a crate a distance of 1.89 m across the floor. What is the work done by the frictional force
If a person exerts 44 N of force on the back of a seat while stopping in 0.4 seconds, what is the impulse on the seat back
A 0.629-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. Find the momentum of the electron
What is the minimum speed in km/s , with which a metoer strikes the top of the earths stratosphere (about 14km above earths surface) assuming that the meteor being as a bit of interplanetary debris far from earth? Assume the drag force is neglible un..
An object carries a charge of -6.6 µC, while another carries a charge of -2.0 µC. How many electrons must be transferred from the first to the second object
A marble is thrown horizontally with a speed of 19.0 m/s from the top of building. When it strikes the ground, marble has a velocity that makes an angle 75° with the horizontal. From what height above the ground was the marble thrown.
A 54.0kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 3.90m
A partcile is moving along the x-axis has a position given by x=(24t-2.0t^3)m, where t is measured in seconds. What is the magnitude of the acceleration of the particle at the instant when its velocity is zero?
what are the wavelengths of electro magnetic waves in free space that have frequencies of a) 5.00 x 10^19Hz, b) 4.00 x 19^9.
A painter is using a ladder to paint the outside of a house. The ladder, which is 8.44 m long and has a mass of 23.7 kg, Calculate the net torque acting on the ladder
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