Mechanics | Relativity Answers

A rod, 1 cm2 x 200 cm and mass 2 kg, is clamped at its center. When vibrating longitudinally it emits its third overtone in unison with a tuning fork making 6000 vps. How much will the rod be elongated if, when clamped at one end, a stretching force of 980 N is applied to the other end?

Activity-prepare clinometers and using that find the approximate distance of moon from earth.using this distance find approximate diameter of the moon.compare your results with actual values.list the possible errors that can arise and how they can be minimised. prepare a report file. (parallax method).

During lift off a rocket ship accelerates from rest to
about 28000 km/h and reaches an altitude of 300 km.
What is the apparent weight of a 75 kg astronaut during
this time (assume constant acceleration)? Explain why
does an astronaut feel weightless once in orbit?

5. At a given time a shaft is rotating 50 rpm about a fixed axis, 20 s later it is rotating 1050 rpm. Solve its angular acceleration.

2. In 30 s, the crankshaft of a truck engine operating at 2400 rpm turns through how many radians?

physics dynamics:
you are trying to hold your 550 g physics books with your hand against a vertical wall applying a 10 N force. Below the book on the floor you placed a motion sensor, the position time graph for the book decelerates at about a 45° angle. What is the coefficient of kinetic friction?

A pulley system has the following characteristics;
box one has a mass of 2.0×10 to the power of 3 kg, box 2 is at a 90° angle below box one attached by a rope and has a mass of 4.4×10 to the power of 2 kg, the man on top of box 2 has a mass of 6.0×10 to the power of 1 kg. if all surfaces are frictionless, what is the apparent weight of the man?

a pully system has a two boxes. box 1 is on a ledge and has a mass of 2.0×10 to the power of 3 kg, box 2 is attached by a rope at a 90° angle blow box one and has a mass of 4.4×10 to the power of 2 kg. There is a man standing on box number two, what is the apparent weight of the man if all surfaces are frictionless?

Dynamics question:
61kg woman pulling a sled at a constant velocity by means of a rope at 37°. The tension on the rope is 120 N, and the mass of the sled is 55 kg.
a) find the normal force on the sled and on the woman
b) find the kinetic friction acting on the sled in the static friction acting on the woman
c) find the coefficient of kinetic friction for the sled