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A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 20.5m/s , and the distance between them is 55.0m . After t= 5.00s , the motorcycle starts to accelerate at a rate of 7.00m/s^2 . The motorcycle catches up with the car at some time. How long does it take from the moment when the motorcycle starts to accelerate until it catches up with the car? In other words, find t2-t1? How far does the motorcycle travel from the moment it starts to accelerate (at time t1) until it catches up with the car (at time t2 )?
An object is placed to the left of a convex lens and on the optical axis. find the magnification of the image formed by the lens
A steel ball of mass 0.5 kg is fired vertically up from the edge of a building 20 m high with an initial speed of 10 m/s. When it falls back on the ground at the base of the building, it gets buried in sand to a depth of 0.2 m. Determine: the average..
two equal masses are attached to the ends of a spring whose force constant is k. With what frequency do they oscillate
A small bird's wings can undergo a maximum displacement amplitude of 5.9 cm. what is the oscillation frequency of the wing tips
A proton is shot at 5 × 107 m/s toward a gold atom, with a mass 197 times that of the proton, What is the recoil speed of the gold nucleus
A ramp is 25 meters long and is inclined at 30 degrees with the horizontal. A block of mass 25 is pulled up at a constant acceleration of 1 m/s2. The coefficient of kinetic friction is 0.15. If the box starts at rest from the bottom, what would be..
The energy released by alpha decay in a 500.0-g sample of 238 Pu is to be used to heat 4.50 kg (about 1 gallon) of water. Assuming all the energy released by the radioactive decay goes into heating the water, find how much the temperature of the w..
A small, rigid object carries positive and negative 3.00-nC charges. It is oriented so that the positive charge has coordinates (?1.20 mm, 1.00 mm) and the negative charge is at the point (1.50 mm, ?1.30 mm).
The right-side rearview mirror of Mike's car says that objects in the mirror are closer than they appear. Mike decides to do an experiment to determine the focal length of this mirror. He holds a plane mirror next to the rearview mirror and views ..
Explore the hypothesis of "desertification" by determining the distances required to evaporate a fully formed spherical raindrop (~2 mm diameter) from typical cumulus cover at 2500m. Let h=height(m) above land at sea level.
question11. directions of electric field are indicated on field lines. why dont you have a direction indicated on an
A certain freely falling object requires 1.7s to travel the last 40m before it hits the ground. From what height above ground did it fall.
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