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Q1. An airplane is flying with a velocity of 90 m/s at an angle of 25 above the horizontal. When the plane is a distance 126 straight above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
How far from dog would the suitcase land? You can ignore air resistance.
Q2. A tennis ball is struck at the base line of the court, 12.5 m from the net. The ball is given an initial velocity with the horizontal component equal to 21.0 m/s at an initial elevation of 1.08 m.
(a) What vertical component of initial velocity have to be given to the ball, such that it barely clears the 1.00 m high net?
(b) How far beyond the net would the ball hit the ground?
A 2500-kg sport utility vehicle travelling at 92 km/h can be stopped in 0.25 s if it hits a concrete wall. Assume a 60 kg person was in the car that hit this wall. The velocity of the person equals that of the car both before and after the crash, and..
The level of the liquid surface in the tank can be calculated. If the pressure on the gage is 20 kPa, Determine the depth d of liquid in the tank?
Find the typical speed for a tsunami. (Note down that in the open ocean, tsunamis generally have amplitude of less than a meter, allowing them to pass ships unnoticed. As they approach shore, however, water depth decreases and the waves slow down. Th..
An electric field of 254,000 N/C points due west at the certain spot. What are the magnitude and direction of the force that acts on the charge of -8.1 µC at this spot.
What is the gravitational energy of stone-Earth System
An airplane is flying with a velocity of 95 at an angle of 19 above the horizontal. When the plane is a distance 111 m directly above a dog that is standing on level ground, suitcase drops out of luggage compartment.
The change in the kinetic energy of the system
Find the von Mises stress (in MPa) at the location of the strain gages.
A 790-kg object and an 889-kg object are separated by 11.0 m. At what position (from the less massive object) can the 260-kg object be placed so as to experience a net force of 10 N towards the less massive object.
Problem on a hare and a tortoise battle
I once observed a woman on an airplane at night with a camera. As we flew low over Washington DC she was impressed with the view of the city lights in the dark. She stood back in the aisle and tried to take the picture by the window using her flash. ..
Determine the coefficient of kinetic friction between the block & the table.
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