Mechanics | Relativity Answers

A spring is stretched 5 10 m
−2
× by a force of .N 5 10−4
× A mass of 0.01 kg is placed
on the lower end of the spring. After equilibrium has been reached, the upper end of the
spring is moved up and down so that the external force acting on the mass is given by
F(t) = 20 cos ωt. Calculate (i) the position of the mass at any time, measured form the
equilibrium position and (ii) the angular frequency for which resonance occurs.

A speeder traveling at 110 km/h races past a police car. The police car is at rest and pursues at acceleration of 1.25 m/s^2. How long does it take the cop car to catch the speeder answer in units of seconds? How fast is the police car going when it catches up to the speeder? Is this a realistic speed?

What is mechanics

write short notes on the following forms as applied to motion in strait line :
a) Speed
b) Velocity
c)Acceleration
d)Deceleration

two telegraph poles "A" and "B" at the side of railway are 50m apart.a train which has a uniform acceleration passes pole "A" at speed of 70km/h,and passes "B" 2s later.what is the acceleration of the train ,and how fast is it moving as it passes pole "B"?

An aeroplane flies horizontally at 80m/s in still air. If the aviator wishes to fly due south and the wind is blowing from the south-east at 30m/s.
1. What course must he steer.
2. How long will it take him to arrive at his destination 200km away.

think Of a sport in which athletes desire to have frictional forces as small as possible and describe what the athlete to do to reduce friction

If 2.5m3 of a certain oil has a mass of 2turns. Find it's mass density

The equation of transverse wave on a rope is
y(x, t) = 5sin (4.0t − 0.02x)
where y and x are measured in cm and t is expressed in second. Calculate the
maximum speed of a particle on the rope

A spring is stretched 5 x10^-2 m by a force of 5x 10^−4 N. A mass of 0.01 kg is placed
on the lower end of the spring. After equilibrium has been reached, the upper end of the
spring is moved up and down so that the external force acting on the mass is given by
F(t) = 20 cos ωt. Calculate (i) the position of the mass at any time, measured form the
equilibrium position and (ii) the angular frequency for which resonance occurs.