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A jet aircraft is flying at constant altitude. At t1 = 0 it has components of velocity vx = 150 m/s and vy = 130 m/s. At time t2 = 30.0 s the components of the velocity are vx = -120 m/s and vy = -50 m/s.
a. Sketch the velocity vectors at each time.
b. What is the change in velocity during this time interval?
c. What are the components of the average acceleration during this interval?
d. What is the acceleration's magnitude and direction during this time interval?
The loaded cab of an elevator has a mass of 2.8 x 103 kg and moves 223 m up the shaft in 26 s at constant speed. Explain at what average rate does the force from the cable do work on the cab?
How far is he from the orgin. A simple pendulum has a mass of 0.350 kg and a length of 2.00 m. It is displaced through an angle of 7.0° and then free.
Two lightweight rods 24 {rm cm} in length are mounted perpendicular to an axle and at 180 ^circ to each other. At the end of each rod is a 480 {rm g} mass. The rods are spaced 42 {rm cm} apart along an axle. The axle rotates at 4.90 rad/s.
A television set connected to a 121 V outlet consumes 88 W of power. How long does it take for 10 million electrons to pass through the television.
(a) How much does a 70.0 kg person weigh on the Earth? (b) How much would she weigh on the Moon (gmoon = 0.166g)? (c) How much would she weigh on a neutron star where gstar = 1.43×1011g?
A Carnot engine with a hot-reservoir temperature of 360 has the same thermal efficiency. What is the cold-reservoir temperature in C?
The electric field in a region of space is oriented along the positive y axis. A circle of radius R is placed in xz-plane. The flux of the electric field by this circle is Φ. The same electric field passing through a second circle of radius 2R parall..
You are listening a soft music with a sound level of 50 dB. A subway train passes by whose sound level is 90 dB. What is total intensity level of the combined sound in dB.
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. (a) How many electrons are there in 4.79 liters of water? (1 liter is equivalent to 1.00 × 10-3 m3) (b) What is the net charge of all these electrons?
Two protons are moving directly toward one another. When they are very far apart, their initial speeds are 2.10 e 10^6 m/s. What is the distance of closest approach? Please show work in the answer because I am attempting to learn this.
What angle does water surface make with the horizontal
The cable lifting an elevator is wrapped around a 1.0--diameter cylinder that is turned by the elevator's motor. The elevator is moving upward at a speed of 2.3 . It then slows to a stop, while the cylinder turns one complete revolution.
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