1. Box A is hanging from a string. The string is pulled so that it accelerates downwards at a rate of -1.8 m/s/s. Determine the direction and amount of force of tension on block A.
Force Diagram
Work
a = -1.8 m/s/s
Box A
Answer with Units
Mass = 20 kg
F =
2. Suppose Box A was raised by pulling harder on the rope, causing it to accelerate upwards. What happens, if
anything, to the amount of force of tension in the rope ?
A. tension is more than B. tension is less than C. tension is the same as D. tension is now zero E. It is impossible to
when it accelerated when it accelerated when it accelerated
know the tension
upward
upward
upward

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Which of the following are guidelines to follow for obtaining accurate observations