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Q. A hare and a tortoise compete in a race over a course 2.30 km long. The tortoise crawls straight and steadily at its maximum speed of 0.520 m/s toward the finish line. The hare runs at its maximum speed of 6.00 m/s toward the goal for 0.800 km and then stops to tease the tortoise. How close to the goal can the hare let the tortoise approach before resuming the race, which the tortoise wins in a photo finish? Assume that, when moving, both animals move steadily at their respective maximum speeds.
A coffee filter of mass 1.4 grams dropped from a height of 2 m reaches the ground with a velocity of 0.6 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter.
The elevator is firstly at rest. How far does the elevator move even as accelerating to full speed from rest.
A 30 gram mass is hanging from a spring whose unstretched length is 20 cm and whose spring constant is 2.5 N/m. In the list below are described 5 situations. In some of the situations, mass is at rest and remains at rest. In other situations, at the ..
A small object with a mass of 333 mg carries a charge of 30.0 nC and is suspended by a thread between the vertical plates of the parallel-plate capacitor. The plates are separated by 2cm.
Heather and Jerry are standing on a bridge 46 above a river. Heather throws the rock straight down with a speed of 20. Jerry, at accurately the same instant of time, throws a rock straight up with the same speed. Overlook air resistance.
A lead ball is dropped into a lake from a diving board 5 above the water. After entering the water, it sinks to the bottom with the constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 3.20 after it is f..
If a car traveling at 66 km/h will skid 20 m as its brakes lock, how far will it skid if it is traveling at 120 km/h when its brakes lock.
Florence, who weighs 120 lbs, stands on a bathroom scale in an elevator. What would the scale read when the elevator is accelerating downward at 2m/s2.
The drawing shows an equilateral triangle, each side of that has a length of 2.00 cm. Point charges are fixed to each corner, as shown. The +4.0 C charge experiences a net force due to the charges qA and qB. This net force points vertically downwa..
The two forces in each pair could have different physical origins (for instance, one of the forces could be due to gravity, and its pair force might be due to friction or electric charge).
compute the tension in a string that whirls a 2kg toy in a horizontal circle of radius 2.5m when it moves at 3m/s
Two narrow slits 41 µm apart are illuminated with light of a wavelength 604 nm. What is the angle of the m=3 bright fringe in degrees.
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