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A 1 255.0 kg car traveling initially with a speed of 25.000 m/s in an easterly direction crashes into the back of a 9 400.0 kg truck moving in the same direction at 20.000 m/s. The velocity of the car right after the collision is 18.000 m/s to the east. (a) What is the velocity of the truck right after the collision? (Give your answer to five significant figures.) (b) What is the change in mechanical energy of the car–truck system in the collision? (c) Account for this change in mechanical energy.
A string 1.50 m long will break if the tension in it exceeds 2X10^2N. How fast (in m/s) can a rock of mass 1.50 kg be whirled in a circular horizontal path if the string is not to break? Assume the rock moves on a smooth horizontal surface (No fri..
The drawing shows a coin resting on the bottom of a beaker filled with an unknown liquid. How fast is the light traveling in the liquid
TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 72.0-kg physicist placed himself, By how much was the antenna compressed
At one point in space, the electric potential energy of a 10 charge is 34. If a 25 charge were placed at this point, what would its electric potential energy be
The velocity of an object falling in free fall increases with time. Does the acceleration also increase? Why or why not?
q1. determine the tension in each cable if boat has a mass of 490 kg and the angle of each cable is 50 degrees from the
sketch the frequency spectrum representing a harmonic vibration of frequency 10v, modulated harmonically at a frequency v.
A single conservative force F(x) acts on a 2.9 kg particle that moves along an x axis. The potential energy U(x) associated with F(x) is given by U(x) = -3.8xe^-x/5, What is the mechanical energy of the system
A 58.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.700 and 0.480, respectively. What horizontal pushing force is required to just start the crate moving
A submarine is 308 m horizontally out from the shore and 141 m beneath the surface of the water. find the height of the building
A 58.6g mass connected to a spring with a force constant of 31.2 N/m oscillates on a horizontal, frictionless surface with an amplitude of 3.70 cm. Calculate the total energy of the system
A cannon shoots a cannonball from the ground level (ignore the height of the cannon) to the top edge of a cliff that is 135m high. What will be the speed of the ball when it hits the cliff
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