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A volleyball play jumps into the air by first lowering his body by. .4 m and then accelerating by straightening his legs rapidly. As a result, his body is lifted .8 m above the floor level. What is the velocity of the volleyball player at the moment of leaving the ground? What is the corresponding acceleration in units of g? If his mass is 75 kg what is the force exerted by his feet on the floor?
Three charges are positioned on a line. Q1= -2uC, Q2= +5uC, Q3= +3uC. The distance between Q1 and Q2 is a=0.25m. Find the direction of the electric force acting on the charge
An elevator accelerates upward at 1 m/s2. When the elevator is moving upward at 2 m/s, a bolt drops from the ceiling which is 2.5 m above the?
Janet jumps off a high diving platform with a horizontal velocity of 1.55 m/s and lands in the water 1s later. How high is the platform? The acceleration of gravity is 9.80 m/s2.
You then kick the ball with the same initial velocity and at the same angle to the horizontal. This time, however, you kick it up a 15 degree slope. What is the horizontal range of the ball's travel
An electron of mass, m, collides with an atom of mass M. The atom is initially at rest, What is the minimum speed of the electron in order to excite the atom
It continues to fly along the same horizontal arc, but increases its speed at the rate of 1.45 m/s2. Find out the acceleration in this situation at the moment the hawk's speed is 4.60 m/s.
The lows note emitted by stretched string has a frequency of 50Hz.how many outcome are possible between 40Hz and 170Hz.
A television is tuned to a station broadcasting at a frequency of 6.30×10^7Hz. Find the optimum length of the antenna
An object is to the left of a thin lens. The lens forms an image on a screen that is 2.60 m to the right of the object. Is the image upright or inverted
a ball of mass 1.00kg moves due east at 3.00 m/s. a ball of mass 2.00 kg moves due south at 2.00 m/s. they collide at the origin. what is the final velocity of the other ball
During the Millikan experiment used to determine the charge on the electron, a charged polystyrene microsphere is released in still air in a known vertical electric field, How many excess electrons are on the sphere
What is acceleration of the elevator
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