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A rubber ball (1 kg) falls from a height of 25 m and collides elastically with the floor. What is the velocity of the ball just after it rebounds from the floor?
A.2m wire is moved perpendicular to a.5magnetic field at a speed of 1.5m/s. what emf is induced across the ends of the wire
A man pulls a suitcase from its handle, making an angle of 45 degress above the horizontale. While moving the suitcase horizontally over a distance of 40 m, 820 J of work are done by the man on the suitcase. Find the pulling force of the man.
Assuming that the activity obeys an exponential decay law, find the equation that best represents the activity and calculate the decay constant and the half-life.
a certain freely falling object requires 1.95 s to travel the last 36.5 m before it hits the ground. from what height
Two identical 1.70kg masses are pressed against opposite ends of a spring of force constant 1.70N/cm, Find the maximum speed of each mass when it has moved free of the spring on a smooth
There is the information and then the questions: A stationary block has a charge of +6.0×10-4 C. A 0.80-kg cart with a charge of +4.0×10-4 C is initially at rand separated by 4.0 m from the block. The cart is released and moves along a frictionles..
Assume the ball hits the ground, and rebounds, coming to rest at height h = 0.45 meter. Find how much work was done on ball by friction
In an experiment designed to measure the speed of light, a laser is aimed at a mirror that is 58.0 km due north. A detector is placed142 m due east of the laser. The mirror is to be aligned so thatlight from the laser refelects into the detector.
The displacement of a harmonic oscillator is given by y =8.6 sin(14t), Determine what is its maximum velocity
The tip of a scanning electron microscope has a radius ofcurvature of 5 nm, and is at a potential of 3V. estimate the electric field at its surface
A balloon carrying a basket is descending at a constant velocity of 20.0m/s. At the instant the rock hits the ground, how far is it from the basket
If the car is going 55m/s, how many meters will it travel before it stops? How many meters will it takes to stop car going twice as fast.
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