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Question
An Olympic-class sprinter starts a race with an acceleration of 4.07 m/s2. What is her speed 1.36 s later?
A player kicks a football, giving it an initial velocity of 12 m/s W, at an angle of 40 degrees up from the horizontal. A second player, standing 28 m west of the kicker, immediately starts running to meet the ball. With what velocity must the seond ..
an elevator can have a maximum mass 1000kg in it and the elevator has a mass of 2000kg. if the elevator can accelerate
a 72-kg sprinter accelerates from rest to a speed of 11.0 ms in 5.7 s.a calculate the mechanical work done by the
A 2.18-m-long diving board of mass 13.2 kg is 3.00 m above the water. It has two attachments holding it in place. what are the forces acting on the two attachments
A solid insulating sphere of radius a = 5 cm is fixed at the origin of a co-ordinate system as shown. The sphere is uniformly charged with a charge density ? = -312 ?C/m3. find the electric potential at the outer surface of the insulating sphere
a roller coaster traverses a vertical circular track.a what speed must the car have so that it will just make it over
A 4.29 g bullet moving at 686.5 m/s penetrates a tree trunk to a depth of 4.49 cm. Assuming that the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment the bullet stops moving. a..
find the difference in air pressure between the openings
Take the size across of the drop to be 4 mm, the density to be , and the surface area to be .
A small electric car overcomes a 250 N friction force when traveling 30 km/h. How much power is dissipated in the coils
The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. What is the current coming from the wall socket
A computer to be used in a satellite must be able to withstandaccelerations of up to 23 times theacceleration due to gravity. What is the minimum amplitude of vibration
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