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the minimum distance required to stop a car moving at 35 mi/h is 42.6 ft what is the minimum stopping distance for the same car moving at 70 mi/h
Two boats start together and race across a 60-km-wide lake and back. Boat A goes across at 60 km/h and returns at 60 km/h. Boat B goes across at 30 km/h, and its crew, realizing how far behind it is getting, returns at 90 km/h. Turnaround times are negligible, and the boat that completes the round trip first wins.
can i just use 60 km/hr as average velocity for boat b
A pencil has a mas of 200 grams. If it is placed one meter above the ground, what would be its kinetic energy upon hitting the ground?
A coin is placed at the top of a two-story building, having a potential energy of 20 J. If it has a mass of 2.50 grams, what would be its velocity upon hitting the ground?
How much work is required to accelerate a 1500kg car from 15 m/s to 40 m/s?What is the average net force acting on the car if it covers a distance of 275m?
A 70N force is applied horizontally to a 10kg block at rest for a displacement of 200m across a frictionless surface. How much work is done by the force? What is the acceleration of the block?
The speed v in a gas can reasonably be dependent on the pressure p, the density p, and the volume V of the gas. Using dimensional analysis, determine the exponents l,m and n in the formula v=Cp^lp^mV^n
A string is attached to a body of mass 2 kg which is at rest on the ground. If the string is pulled vertically upward with a constant force of 42 N, find how far the body rises during the first second.
A 1.4 m long thin uniform rod is pivoted at one point so that it oscillates like a physical pendulum. Compare the angular frequency of this physical pendulum with a simple pendulum of the same length, both oscillating near the earth’s surface.
