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The stoplight had just changed and a 1800 kg. Cadillac had entered the intersection, heading north at 2.4 m/s , when it was struck by a 1100kg eastbound Volkswagen. The cars stuck together and slid to a halt, leaving skid marks angled 35 degrees north of east. How fast was the Volkswagen going just before the impact?
On a workday the average decibel level of a busy street is 80 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 45 every minute on a weekend, what is the decibel level of the street.
In a new (inelastic) collision, the same two bumper cars with the same initial velocities now latch together as they collide. What is the final speed of the two bumper cars after the collision
At the instant shown, the spring is unstretched and B is moving downward at 4 ft/s. Use conservation of energy to identify velocity of B when it has moved downward 2 ft from its current position.
if the maximum height from which a person can jump without a parachute and still survive is 7.50 meters the maximum
A bucket of mass m is tied to a massless cable that is wrapped around the outer rim of a frictionless uniform pulley of radius R. what must be the moment of inertia of the pulley
a rock is thrown straight up with intial velocity of 15.5m/s. what maximum height will the rock reach before starting to fall downward
If a charge of 0.30 C passes through a person's chest in 1.0 s, If this rate of charge transfer persists for 4.4s, how many electrons pass through the chest
q1. a cylinderical water tank of radius 10ft and height 30ft is half filled with water. how much work is essential to
An airplane having a mass of 10000kg and moving at 200mph is at an altitude of 15000m. What are the airplanes kinetic and potential energy
A 23.0 g block of copper whose temperature is 447 K is placed in an insulating box with a 92.4 g block of lead whose temperature is 132 K. find the equilibrium temperature of the two-block system
In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year
q1. a car is travelling with a velocity of 88.0 kmh. it accelerates at a constant rate of 20 ms2. if the acceleration
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