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Two cars are traveling along a straight road. Car A maintains aconstant speed of 82 km/h and car Bmaintains a constant speed of 90 km/h.At t = 0, car B is 39 kmbehind car A.
a) How much farther will car A travel before car B overtake sit?b) How much ahead of A will B be 30 s after it overtakes A?
A 2.95-kg block initially at rest at the top of a 3.69-m incline with a slope of 42.7° begins to slide down the incline. How fast is the block moving at the bottom of the incline
he rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV. Assume both particles have kinetic energies of 2000 MeV. Find the speed of the proton
If an object is moving with constant momentum ‹ 8, ?14, ?4 › kg · m/s, What is the net force acting on the object
In extremely cold weather conditions where the inside thermostat is set to 27 C and the outside temperature is -20 C, your 1200 square ft house might lose heat through the walls at a rate of 4000 W.
Two soccer players, Mia and Alice, are running as Alice passes the ball to Mia. What is the magnitude and direction of the velocity of the ball relative to the ground
A cart is propelled over an xy plane with acceleration components ax = 6.1 m/s2 and ay = -1.7 m/s2. what is the velocity of the cart when it reaches its greatest y coordinate
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.9 m/s^2 for a height 61.0 cm. How much time does he have to get out of its way before it returns to the height of the top of his head, a ..
When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. How far from the Earth's surface must the spacecraft be
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 32.9 dB. what is the intensity delivered to the eardrum
A person rides a bike 6.5 miles in 26 min up a mountain, climbing 1900 vertical feet. how much work did his muscles do
A 1.2 kg particle moves from an initial position r1 = 4i - 2j + 3k m to a final position r2 = 7i - 3j -4k m while a force F = 6i - 4j + 2k N acts on it. What is the work done by the force on the particle
A proton accelerates from rest in a uniform electric field of 628 N/C. At some later time, its speed is 1.10106 m/s. What is its kinetic energy at the later time
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