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Question1
A car is stopped at a traffic light. It next travels along a straight road so that its distance from the light is given by x (t) = bt2 - ct3, where b = 2.40 m/s2 and c = 0.120 m/s3.
(a) Compute the average velocity of the car for the time interval t = 0 to t = 10.0s.
(b) Analyse the instantaneous velocity of the car at t = 0, t = 5.0 s, and t = 10.0 s.
(c) How long after starting from rest is car again at rest?
Question2
A person is pulling a block of mass m with a force equal to its weight directed 30 degrees more than the horizontal plane across a rough surface, generating a friction f on the block. If person is now pushing downward on the block with the same force 30 degrees above the horizontal plane across similar rough surface, what is friction on the block?
Two charges repel each other with a force of 0.1 N when they are 5 cm apart. Find the forces between the same charges
What is speed of the car just before it lands safely
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A wooden block weighing 7 N is at rest on top of a wooden desk. The coefficient of static friction between the block, Find the minimum horizontal force required to move the block
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I hold a flat mirror 24.6 cm in front of my face. There is a freckle on my face 1 mm in diameter. Find the angular size of the freckle on the image of my face as viewed by my eye
The wave function y(x, t) for a certain standing wave on a string fixed at both ends is given by y(x, t) = 3.70 sin (0.220x) cos (270t), What is the speed of transverse waves on this string
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A copper (Young's modulus 1.1 x 1011 N/m2) cylinder and a brass (Young's modulus 9.0 x 1010 N/m2) cylinder are stacked end to end, Find the amount by which the length of the stack decreases
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