Mechanics | Relativity Answers

a radio-operated car travels 12.0 meters east in 4 seconds then 5.0 meters northin 2 seconds (yes, the car can make 90 degree turns without pausing). (A) Drawa vector map that describes the car's motion, including the car's displacement.(B) Calculate the car's average speed for the entire 6-second trip. (C) Calculatethe car's average velocity (magnitude and direction) for the 6-second trip.

two spaceships traveling .6 and .9 respectively come upon a planet that measures 4.5x10^12 m. Find the radius that each ship will measure. Please help. I now i am supposed to use ..L'=L/Y(GAMMA) ..

A rebounder in v basketball has a vertical leap of 1.2 meter. What is his launch speed and "hang time"?

Two small beads having opposite charges q1= 3q and q2=q are fixed at the opposite ends of a horizontal insulating rod of length d= 1.50 m. The bead with charge q1 is at the origin. A third small charged bead is free to slide on the rod. (A) at what position X is the third bead in equilibrium? (B) can the equilibrium be stable

Two waves y1 = A cos( 0.5 πx − 100 πt)
and y2 = A cos( 0.46 πx − 92 πt) are travelling in a pipe placed along x-axis. Find the number of times
intensity is maximum in time interval of 1 sec.
a)4 b)6 c)8 d)10

Two particles projected from the same point with equal speeds at an angle α &β strikes the horizontal ground at the same point. If H1 & H2 be maximum height be the range for both, T1 & T2 is the time of flight. Then
1. α +β=½
2. R=4H1H2
3. T1/T2=tanα
4. Tanα=h1/h2

Where from the satellite gets force for its motion? Explain the condition for good satellite communication

Prove that the motion of a simple pendulum is simple harmonic motion. Also show that the time period of
simple pendulum of very large length is independent of length

Find an expression for the energy density n terms of stress and strain?

The resultant intensity of the interference pattern formed by the two waves represented by, Y1=a1cos ωt and Y2=a2cos(π/2-ωt) is: a)a1-a2 b)a1+a2 c)a1^2-a2^2 d a1^2+a2^2