non uniform circular motion???
A .400 kg object is swung in a vertical circular path on a string 0.500m long. If it's speed is 4.00 m/s at the top of the circle, what is the tension in the string there?
i drew my free body diagram and have tension pointing up in the positive y direction. the...
there is an athlete climbing a rope in gym class. he gets to a point halfway up the rope and is stationary. someone puts a bag of sand that is equal in weight to the athlete. they are both static and then the athlete starts to climb the rope, slowing and speeding up at random...
stratosphere ride in las vegas???
i was going to write a short essay about the forces felt when you are on this ride and i wanted to confirm my often erroneus assumptions.
it is a ride that sits at rest and then it catapults you with a fast initial velocity straight up and then it lets you...
In a snowball fight 2 snowballs are thrown in the same direction, but one is thrown 70.0 degrees with respect to the horizontal and the other is thrown some arbitrary distance lower. they both are thrown with a speed of 25.0 m/s.
At what angle should the one that is thrown lower be to arrive...
Question: A man is jumping into a river that is 23.0m below a bridge.
1. how long does the jump last?
answer: 2.17 seconds
2. how fast was the diver traveling upon impact with the water?
answer: 21.2 m/s
3. If the speed of sound in air is 340 m/s, how long after the diver took off...
Here is the problem:
An auditorium measures 40.0m X 20.0m X 12.0m. the density of the air is 1.20kg/m^3.
a) what is the volume in cubic ft?
b) the weight of the air in the room in pounds.
for a) i have some big answer. 339020 ft^3. using V=l*w*h and then using basic dimensional...