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Q. A 77-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 822 N. What is the acceleration of the elevator?
Q. A 20.0 {rm kg} child plays on a swing having support ropes that are 2.30 {rm m} long. A friend pulls her back until the ropes are 39.0^circ from the vertical and releases her from rest?
Cheetahs, fastest of the great cats, can reach 45 in 2 starting from rest. Assume that they have constant acceleration throughout that time, find their acceleration (in (a) and (b) ) and the distance (in (c) and (d) ) Q2. They travel during that t..
Dan is gliding on his skateboard at 2.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is 60 kg and the skateboard's mass is 5.0 kg.
A baseball player runs 27.4meters from batter's box to first base,overruns first base by 3.0 meters,and then returns to first base. Compared to the total distance traveled by the player,magnitude of the players total displacement from the batters ..
Assume the charge on black hole is 5740 C. At what distance from it is the electric potential equal to 1100 V.
What is minimum important in returning blood to the heart? Negative intrathoracic pressure, valves and veins, the pumping action of skeletal muscles, or the pushing of blood by arterial system.
Megan's mass is 27 kg. She climbs the 4.8 m ladder of a slide and reaches a velocity of 3.6 m/s at the bottom of the slide. How much work was completed by friction on Megan? Imagine that air resistance is negligible.
Two small non conducting spheres have a total charge of 85.2. When placed 1.09 apart, the force each exerts on the other is 10.4 and is repulsive. What is the charge on each.
For a damped oscillator with a mass of 180 g, a spring constant 58 N/m and a damping coefficient of 60g/s, what is the ratio of the amplitude of damped oscillations to the initial amplitude at the end of 26 cycles.
What is the value of g at the location of this satellite. Discover the altitude of the satellite in meters.
What is the electric potential energy of three equal positive charges of 1.33 µC while they are arranged to form a triangle 2.10 x 10-3 m on a side.
What are sunspots and how are they related to the Sun's magnetic field? Is the magnetic field stronger weaker in sunspots? How does the temperature in a sunspot relate to the temperature in the rest of the photosphere.
A car of mass = 1300 travelling at 56.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and car's tires. What is the radius of the turn if = 20.0 (assuming the car continues in uniform ..
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