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Q. The loaded cab of an elevator has a mass of 2.7 x 103 kg and moves 198 m up the shaft in 27 s at constant speed. At what average rate does the force from the cable do work on the cab
Q. A race car has a mass of 701 kg. It starts from rest and travels 35.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?
A balloon rises at at constant velocity of 3m/s. A rock is released over the side. 4.5 seconds later this rock hits the ground. compute the height of the rock when it is halfway between the balloon and the ground. Assume Earth gravity (-9.81m/s), ..
Ice at -10.2 °C and steam at 136 °C are brought together at atmospheric pressure in a perfectly insulated container. After thermal equilibrium is reached, the liquid phase at 53.0°C is present.
The first active volcano observed outside the Earth was discovered in 1979 on Io, one of the moons of Jupiter. Assume a volcano on another moon is observed to be ejecting material to a height of about 2.19 x10^5 m.
what is the kinetic energy of the system. assume the roller coaster in Fig. 6-41 (h1 = 36 m, h2 = 14 m, h3 = 25) passes point 1 with a speed of 2.00 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it ..
An 8m, 290 N uniform ladders rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50° angle with the ground. How far up the ladder can a 720 N person climb before the lad..
Airplane A , starting from rest with constant acceleration, requires a runway 600{\rm m} long to become airborne.
A magnifying glass is a single convex lens with a focal length of f = +13.0 cm.
As a positron moves through a region of space, its speed increases from 2.80 X10^6 m/s to 8.00 X10^6 m/s. The electric force is the only force acting on the positron. Across what potential difference did the positron travel?
Find the use of an NPN common emitter transistor, advantage of direct - coupled amplifier and bandwidth of an amplifier.
What is the magnitude of net force causing the acceleration.
In addition, the snow exerts a retarding force on the sled that points opposite to direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
The gravitational acceleration on the Moon is a sixth of that on Earth. The weight of an apple is 1.03 N on Earth. (a) What is the weight of the apple on the Moon? (b) What is the mass of the apple?
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