How high above the starting point does the pebble fly
You shoot a 58-g pebble straight up with a catapult whose spring constant is 310 N/m. The catapult is initially stretched by 0.20 m. How high above the starting point does the pebble fly? Ignore air.
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The mercantilist system will eventually be cited as a reason for the American Revolution. However, this was not always the case.
A child of mass 24 kg swings at the end of an elastic cord. At the bottom of the swing, the child's velocity is horizontal, and the speed is 8m/s. At this instant the cord is 3.10 m long. At this point, what is the magnitude of rate of change of t
Three equal point charges, each with charge 1.25mC , are placed at the vertices of an equilateral triangle whose sides are of length 0.450m . What is the electric potential energy of the system?
A ranger in a national park is driving at 32 km/h when a deer jumps onto the road 50 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.00 m/s2. What is the maximum reaction time al
A 40 kg barrel is rolled up a 10 meter long ramp to a height of 5 meters. how much does the barrel weigh? how much work was done? if the person exerted an effort force of 250 newtons to roll the barrel along the ramp, what is the efficiency of the
Two small objects of equal weight are attached to the ends of a thin weightless bar that spins about an axis perpendicular to the bar at its center. Each mass is a distance d from the axis of rotation. The system spins at a rate so that its kineti
A box of mass 29.9 kg is subject to a horizontal applied force of 378 N, and it accelerates to the right at 10.7 m/s2. What is the net x-direction force on the box?
When the paper is held 29 below the lens, the sunlight is focused on the paper and the paper ignites. What is the focal length of the lens?
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