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The front end of an automobile has been designed so that upon impact it progressively crumples by as much as .70m. Suppose that the automobile crashes into a solid brick wall at 80 km/h. During the collision the passengner compartment decelerates over a distance of 0.70m. Assume that the deceleration is constant. What is the magnitude of the deceleration? If the passenger is held by a safety harness, is he likely to survive? (Hint: Compare the deceleration with the accerleration listed of a parachutist in Table 2.2.)
A certain lightbulb is rated at 165 W when operating at an rms voltage of 1.5 V. What is the peak voltage applied across the bulb
What is the maximum speed of the car (in km/hr) in the similar turn in the rain, when the coefficient of static friction is reduced to 0.720.
q1. a jetliner is moving at a speed of 274 ms. the vertical component of the planes velocity is 54.0 ms. conclude the
A block with mass m = 16.0 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 5205.0 N/m after being compressed a distance x1 = 0.481 m from the spring's unstretched length. What is the speed of the block after..
Light is incident normally on the largest face of an isosceles-right-triangle prism. What is the speed of light in this prism
A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies with time according to ?(t)=?t+?t3, What is the initial value of the angular velocity
From illustrate what height did the student fall? Suppose that the only force acting on him during the collision is that due to the ground.
Estimate the wavelength of the light.
A 55.5 kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. What is the ratio of this force to her weight
A bicycle break pad is pushed against the moving rim of the wheel with a force of 80 N and the dynamic coefficient of friction is 2.2, What is the shear modulus of the rubber that the pad is made from
What is the minimum diameter mirror on a telescope that would allow you to see details as small as 4.90 km on the moon some 384000 km away
In adding, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
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