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A 0.140 kg baseball is thrown with a velocity of 40 m/s. It is struck with an average force of 5000.0 N, which results in a velocity of 37.0 m/s in the opposite direction. How long were the bat and ball in contact?
A bat (see the image below) can detect very small objects, such as an insect whose length is approximately equal to one wavelength of the sound the bat makes. what is the smallest insect the bat can detect
q1. a roller-coaster track has six semicircular dips with different radii of curvature. the similar roller-coaster cart
A place kicker should kick a football from a point 35m (about 38.0 yd) from the goal, and the ball should clear the crossbar, which is 3.05 m high. When kicked, ball leaves the ground with a speed of 21.0 m/s at an angle of 55° to the horizontal.
The system is released from rest with the rod horizontal. If the animals can manage to hold on, illustrate what are their speeds as the rod swings through a vertical position?
During a drive by golfer Tiger Woods, the angular velocity of his club is zero at the top of the backswing and the 1719 degree/second at the bottom of the downswing just before impact with the ball
A steel ball of mass M is released from rest at point P. It follows a smooth curved rail to point Q and finally reaches point R with K.E. of 7J. The speed of the ball at point Q is 2MS-1 and the height between point P and the ground is 3m. Then find ..
A 30 g steel ball bounces elastically on a steel plate, always returning to the same maximum height h = 14.2 m. With what speed does the ball leave the plate
A 605 N woman climbs a staircase that rises at 47 degrees above the horizontal and is 4.70 m long. Her speed is a constant 40.0 cm/s. How much work has gravity done on her as she climbed the stairs
A ball of mass m is tied to a vertical (Cyclinder) post of radius R. The mass slides on a frictionless, What is the angular momentum of the ball after the string has wrapped once around the post
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 4.41 × 10-11 m. Determine the magnitude..
What is the magnitude of the apparent weight of a 68kg astronaut 2600km from the center of the Earth's Moon in a space vehicle accelerating toward the Moon at 2.1m/s2
A 5.00-g bullet, traveling horizontally with a velocity of magnitude 490 m/s, is fired into a wooden block with mass 0.800 kg, initially at rest on a level surface. What is the decrease in kinetic energy of the bullet
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