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A bullet is fired through a wooden board with a thickness of 11.0 cm. The bullet hits the board perpendicular to it, and with a speed of +390 m/s. The bullet then emerges on the other side of the board with a speed of +234 m/s. Assuming constant acceleration (rather, deceleration!) of the bullet while inside the wooden board, calculate the acceleration.
And Calculate also the total time the bullet is in contact with the board (in sec).
A rock is thrown vertically up at 6.7 m/s. (a) What is it's height when its velocity is 1.35 m/s? (b) Has the rock made it to the highest point in the path?
Relative to the ground, a car has a velocity of 14.5 m/s, directed due north. Relative to this car, a truck has a velocity of 24.5 m/s, directed 52.0° north of east. What is the magnitude of the truck's velocity relative to the ground?
A physics professor is pushed up a ramp inclined upward at an angle 33.0^\circ above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 82.0 kg.
a loading car is at rest on a track forming an angle of 25 degrees with the vertical. the gross weight of the car and
The distance between the plates of a parallel plate capacitor with air between the plates is 9 mm. what is the new energy stored in the capacitor
A paperweight consists of a 9.00-cm thick plastic cube. Within the plastic a thin sheet of paper is embedded, what is the index of refraction of the plastic
A weightlifter lifts 50 kg a total vertical distance of 0.28 m at a constant speed in 1.00 seconds. What power was exerted
A certain freely falling object requires 1.7s to travel the last 37m before it hits the ground. From what height above ground did it fall.
Two children setup a "telephone" by placing a long, slender aluminium (Y = 6.9 × 1010 N/m2) bar that has a length of 6.1-m between their two houses. To communicate, the child taps a coded message on one end. How long do the sound waves take to reach ..
Two blocks of mass 2kg and 4 kg are held together by a string force of 10N is applied on 2kg and 20N on 4kg find the tension in the string connected between two blocks
A spaceship is emitting 500-nm light and traveling toward us at 10% the speed of light
a thin metallic spherical shell of radius 42.1 cm has a total charge of 9.05 oc uniformly distributed on it. at the
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