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A motorist suddenly notices a stalled car and slams on the brakes, negatively accelerating at 6.2 . Unfortunately this isn't enough, and a collision ensues. From the damage sustained, police estimate that the car was going 16 at the time of the collision. They also measure skid marks 36 long. Express your answer to two significant figures and include the appropriate units. (a) How fast was the motorist going when the brakes were first applied? (b) How much time elapsed from the initial braking to the collision?
Two positive charges of 7.40 micro-Coulombs are placed on a horizontal surface with a coefficient of static friction 0.72. If they are originally far apart.
The ball is 21.9 m from the goal post. The ball is kicked with an initial velocity of 19.8 m/s at an angle θ above ground. Between what two angles, θ1 and θ2, will the ball clear the 2.74m high crossbar.
Find graphically magnitude and direction of resultant force
The centripetal and tangential accelerations are equal
what was the initial speed given to the rock. A light plane is headed due south with the speed of 154 km/h relative to still air. After 1.06 hour, the pilot notices that they have covered only 127km and their direction is not south but southeast (4..
A couple is defined as two parallel forces, separated by a distance, that have equal magnitudes but opposite directions. A couple only produces a rotation in a specified direction. The moment produced by a couple is known as a couple moment.
On a workday the average decibel level of a busy street is 72.0 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 50 every minute on a weekend, what is the decibel level of street.
A rotating cylinder about 12.00 km in length and 8.00 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it would experience the same acceleration because of gravity on Earth.
What is the gravitational energy of stone-Earth System
What is the greatest distance foot of the ladder can be placed from the base of the wall without the ladder immediately slipping.
Dennis, driving his 600 kg car, makes a 90 degree turn. His speed before the turn is 15.0 m/s and after the turn are 20 m/s. What is the magnitude of the change in car's momentum.
Two parallel conductors carrying current in the same direction attract each other. If they are permitted to move toward each other, the forces of attraction do work. Where does the energy come from? Does this contradict the assertion in that magne..
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