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Q1. On an icy day, you worry about parking the car in your driveway that has an incline of 12 degrees. Your neighbour's driveway has an incline of 9.00 degrees, and the driveway across the street is at 6.00 degrees. The coefficient of static friction between tire rubber and ice is 0.15. Which driveway will be safer to park in?
Q2. A 40-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, kinetic energy decreases to 240J from 470J. How high does she rise during this interval? Avoid air resistance.
Evaluate the stability of of Na in the NaCl structure
If the magnetic field strength is 0.845 T, what is magnitude and direction of the magnetic force on the wire between the poles
Discuss briefly centripetal acceleration, the speed and the force exerted by a ball attached to a string.
What is the ratio of the amplitude
She notices a group of workers down the walkway who have suddenly blocked her path, and she makes a quick stop in 1.8 seconds. What is Suzies average acceleration
A Carnot engine whose cold reservoir temperature is 1.0 C has a thermal efficiency of 40%. By how much should the temperature of the hot reservoir be increased to raise the efficiency to 60%?
A continuous line of charge lies along an x axis, extending from x = +x0 to positive infinity. The line carries charge with the uniform linear charge density λ0. What are the magnitude and direction of the electric field at the origin.
Net average force using the concepts of Newton’s second law.
What is coefficient of kinetic friction
What is the gravitational energy of stone-Earth System
A dynamite blast at a quarry launches a rock straight upward, and later it is rising at a rate of 15m/s. Assuming air resistance has no effect on the rock, calculate the total time the rock is in the air.
A space traveller whose mass is 104kg leaves earth. What are his weight and masson earth and in interplanetary space where there are no near planetary objects.
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