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Question1
An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with constant 5.95 106 N/m and is condensed 3.53 cm as the car is brought to rest. What was the speed of the car before impact; assume no energy is lost in the collision with the wall?
Question2
A glaucous-winged gull, ascending straight upward at 5.00 m/s drops a shell when it is 14.0 m above the ground.
(a) What is magnitude and direction of the shell's acceleration just after it is released?
(b) Discover the maximum height above the ground reached by the shell.
(c) How long does it take for the shell to reach the ground?
(d) What is the speed of the shell at this time?
A 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. at what rate does the box accelerate down the slope
The log has a mass of m = 919 kg; the truck has a mass of M = 8550 kg. According to the truck manufacturer, Calculate the minimum coefficient of static friction
A small glass bead has been charged to +19 nC. A metal ball bearing 1.0 cm above the bead feels a 0.020 N downward electric force. What is the charge on the ball bearing
Speedy Sue, driving at 33.0 m/s, enters a one-lane tunnel. She then observes a slow-moving van 175 m ahead traveling with velocity 5.10 m/s. Sue applies her brakes but could accelerate only at -2.00 m/s2 because the road is wet. Will there be a co..
2.0 kg block is attached to a spring with spring constant 22 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 46 cm/s.
A light ray in air is incident on a transparent material whose index of refraction is n, Evaluate your expression for light incident on glass
A rifel with a barrel length of 63cm fires a bullet with a horizontal speed of 380m/s. How long does it take for the bullet to come to rest after entering the wood
A ball is thrown directly upward with an initial velocity of 10 m/s. how long is the ball in the air
The electric field points radially outward at all points within the sphere (and outside too, for that matter). What is the strength of the electric field at a distance r from the center, inside sphere.
A 69N box of clothes is pulled 8.9 m up a 30° ramp by a force of 100 N that points along the ramp. If the coefficient of kinetic friction between the box and ramp is 0.22, compute the change in the box's kinetic energy.
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.50 m and 0.98 m, respectively. Calculate the speeds of the tips of both rotors
What average thermal power is produced as rock stops?
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