Mechanics | Relativity Answers

A car can travel at 20000 meter per sector 2 hours at 90 kilometer per hour for next 3 hours,and finally for 200000 centimeter per second what is the car average velocity in km/hr for entire period

Find an expression for the energy density in terms of stress and strain.

Explain force of tension on a string using diagrams.

A projectile is fired at an upward angle of 35.0 degrees from the top of a 225-m cliff with a speed of 235m/s . What will be its speed when it strikes the ground below? (Use conservation of energy.)

The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One track is longer than the other, however. Identical blocks are projected up each track with the same initial speed v0. On the longer track the block slides upward until it reaches a maximum height H above the ground. On the shorter track the block slides upward, flies off the end of the track at a height H1 above the ground, and then follows the familiar parabolic trajectory of projectile motion. At the highest point of this trajectory, the block is a height H2 above the end of the track. The initial total mechanical energy of each block is the same and is all kinetic energy. The initial speed of each block is v0 = 7.47 m/s, and each incline slopes upward at an angle of θ = 50.0°. The block on the shorter track leaves the track at a height of H1 = 1.25 m above the ground. Find (a) the height H for the block on the longer track and (b) the total height H1 + H2 for the block on the shorter t

A 65.3-kg skier coasts up a snow-covered hill that makes an angle of 35.0 ° with the horizontal. The initial speed of the skier is 9.64 m/s. After coasting a distance of 2.37 m up the slope, the speed of the skier is 4.00 m/s. (a) Find the work done by the kinetic frictional force that acts on the skis. (b) What is the magnitude of the kinetic frictional force?

A golf ball strikes a hard, smooth floor at an angle of 26.3 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.0457 kg, and its speed is 58.7 m/s just before and after striking the floor. What is the magnitude of the impulse applied to the golf ball by the floor? (Hint: Note that only the vertical component of the ball's momentum changes during impact with the floor, and ignore the weight of the ball.)

A piece of plastic barely floats in water if it has a mass of 20g, what is its volume

A 100N weight rest on a 30 degrees inclined plane.Neglecting friction,how much pull must one exert to bring the weight up the plane?

the damping force on a oscillating body is propotional to its velocity.the constant of propotionally has the dimensionsof
1)[mt-1] 2)[mlt-2] 3)[mlt-3] 4)[m0l0t0]