Mechanics | Relativity Answers

a car of mass 1400 kg travels at 20 m/s and collides with a stationary truck of mass 2800 kg, with its parking brake off. The two vehicles interlock as a resultof the collision and slide along the icy road. What is the velocity of the car truck system?

a sled is pulled by a rope 25 degrees above horizontal. the sled has a mass of ? and the coefficent of friction is ? . the force applied to the rope is? n calculate the sleds acceleration....

enter in your own numbers into the questions marks but please tellme how i would go about solving this...i have a test tomorrow

The International Space Station is orbiting at an altitude of about 370 km above the
earth's surface. The mass of the earth is 5.976 × 10
24
kg and the radius of the earth is
6.378 × 10
6 m.
(a) Assuming a circular orbit, what is the period of the International Space Station's
orbit?
(b) Assuming a circular orbit, what is the speed of the International Space Station in its
orbit

From t= 0 s to t= 13 s, a car moves east with a constant speed of 11 m/s. Then, from t = 13 s to t = 32 s, the car moves west with a constant speed of 14 m/s. Lastly, from t = 32 s to t = 51 s, the car moves west with a constant speed of 26 m/s. Determine the total distance the car traveled, the car's total displacement, it's average speed, & it's average velocity. Express all answers in the appropriate mks units.

A.) Total distance traveled = 1
B.) Total displacement = 2 3 --- Choose direction --- north south east west zero vector
C.) Average speed = 4
D.) Average velocity = 5 6 --- Choose direction --- north south east west zero vector

A sinusoidal wave of frequency 525 Hz has a velocity of 310 m/s, how far apart are two points that differ in phase by π/3 rad

compare and contrast the use D'Alembert's principle with the principle of conservation of energy to solve an engineering problem.

A particle starts at -2m and moves with a constant velocity of 2 m/h. How would I figure out this problem

a car is traveling at 60km/h. It then accelerates at 3.6m/s2 to 90km/h. How long does it take to reach a new speed? How far does it travel during acceleration?

I visited physics2012.com several days ago and that site showed an experiment that tested a prediction made by the Work-Energy Theorem. It failed telling me and that told me that there is something wrong. That site also showed the sort of experiments other sites give as proof for the work-energy theorem and the mistake such places make. Is it possible that there is something wrong with work, kinetic energy? I'm considering changing my major now. Please help.

What is the equation for momentum?