Mechanics | Relativity Answers

Use the mass and radius of the earth to calculate
how much faster a clock in Denver runs than does a clock in Washington,
D.C. Denver is 1600m higher than Washington, D.C.

7-2. The earth falls freely in a gravitational field that is largely due to the
moon.
. Moreover, the earth is surrounded by a sphere of liquid called the
ocean.Do you expect the ocean to
be perfectly round? Draw a picture of its shape.

A horse canters away from its trainer in a straight line, moving 106 m away in 14.0 s . It then turns abruptly and gallops halfway back in 4.6 s .

A 95kg clock is pushed along the floor at constant speed by a force of 560N . Calculate the coefficient of friction.

The figure shows a claw hammer as it pulls a
nail out of a horizontal board. If a force of magnitude 114 N is exerted
horizontally as shown, find the force exerted
by the hammer claws on the nail. (Assume
that the force the hammer exerts on the nail
is parallel to the nail).
Answer in units of N.

a guitar string resonates on its fundamental at 240Hz. where must you put your hand on the string so that the fundamental becomes 520Hz?

An electric lamp of mass 900g hangs on a flex, which is pulled aside by a horizontal string until the flex makes an angel of 30° by with the vertical. Find the tension in the string and in the flex?

A space bus is carrying student travelling along the positive x axis has a displacement of 6km and 2hrs as it passes traffic officer ...1/2hrs after the space bus passed the officer, he observed that a security dog is running 500m in the same direction of the space bus. What are the coordinates of the traffic officer as measured by the runing dog

A taxi reaches a traffic police officer while travelling at 30m/s on the highway. The officer immediately signals the taxi which decelerates uniformly and comes to complete stop in 5s. (Assume zero reaction time). Draw a velocity-time graph to represent the motion of the taxi from the moment the officer signals, to when the taxi comes to a stop

Of course, the earth also spins on its axis, so that neither city in 7-5 is
standing still... Estimate the relative velocity between the two cities, and
use this to estimate the size of the time dilation effect you would expect
from special relativity. Do we need to consider this effect as well?