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Q1. The front 1.20 m of a 1600 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision.
If a car travelling 25.0 m/s stops uniformly in 1.20 m, how long does the collision last?
Q2. A ceiling fan with 82-cm-diameter blades is turning at 68 rpm. Suppose the fan coasts to a stop 30s after being turned off.
a.) What is the speed of the trip of a blade 10 s after the fan is turned off?
b.) Through how many revolutions does the fan turn as stopping?
What is the mass of sculpture (in kg) assume that the local acceleration due to gravity is 9.80 m/s2.
W hat is lumberjacks speed relative to the shore
How many revolutions does wheel make throughout the time
How to compute Average power output
An isolated copper sphere of radius 4.85cm, at first uncharged, is illuminated by ultraviolet light of wavelength 244nm. The work function for copper is 4.70 eV. What charge does the photoelectric effect induce on sphere.
Examine whether it is reasonable to ignore the effects of gravity for each particle. Evaluate the paths travelled by electron and proton and explain the differences.
A sanding disk with rotational inertia 2.4 10-3 kg•m2 is attached to an electric drill whose motor delivers a torque of 8 N•m about the central axis of the disk. What are the following values about the central axis at the instant the torque has been ..
Questions on blackbody, Infra-Red Detectors & Optic Lens and Digital Image.
What should be the minimum initial speed of the dart so that combination makes a complete circular loop after the collision. find the minimum diameter of the raft that would prevent the diamond from being seen.
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can while it reaches bottom.
A wooden raft has a mass of 67 kg. When empty it floats in water (density 1000 kg/m3) with 51 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
Net average force using the concepts of Newton’s second law.
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