Mechanics | Relativity Answers

Two identical billiard balls undergoes an oblique collision initially one of the ball is stationary if the initially stationary ball after collision moves in a direction which makes an angle of 37 with direction of intial motion of the moving ball then the angle through which initially moving ball will be deflected is

A cyclist travels 5.0 km [S in 45 minuts, then travels 9.0 km [E] in 90 minutes. What is the cyclist's displacement and velocity?

A& block of mass 0.5 kg hanging from a vertical spring executes simple harmonic motion of amplitude 0.1 m and time period 0.314 s. Find the maximum force exerted by the spring on the block.

When a horizontal of 30 N acts upon a 5 kg object on a surface the object moves with constant velocity. Find the coefficient of kinetic friction, between the object and the surface (gravity is equal to 10)

a person travels by car from one city to another with different constant speeds between pairs of cities.she drives for 30 min at 80 km/h,12 min at 100km/h,and 45 min at 40 km/h and spends 15 min eating lunch and buying gas.a)determine the average speed for the trip.b)determine the distance between the initial and final cities along the route

Suppose a spring-mass system has 18Nm 1 −
k = and m = 0.71kg. The system is
oscillating with an amplitude of 54 mm. (i) Determine the angular frequency of
oscillation. (ii) Obtain an expression for the velocity v of the block as a function of
displacement, x and calculate v at x = 34 mm. (iii) Obtain an expression for the mass’s
distance | x | from the equilibrium position as a function of the velocity v and calculate | x |
when v = 0.18 ms−1. (iv) Calculate the energy of the spring-mass system.

A worker in an office 1350 m from The Big Ben sets his watch to 1 o clock when he hears the clock chime through an open window . An hour later at 2& clock he checks his watch using the chimes of the Big Ben heard from the radio and finds that his watch is 4 seconds slow. The watch is working correctly.

Explain why he had set his watch 4 seconds slow at 1 o'clock

6.A stone is dropped vertically from the top of a tower of height 40 m. At the same time a gun is aimed directly at the stone from the ground at a horizontal distance 30 m from the base of the tower and fired. If the bullet from the gun is to hit the stone before it reaches the ground, the minimum velocity of the bullet must be, approximately,

1N=10^5 dynes prove that briefley

A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 80.2 m/s at ground level. The engines then fire, and the rocket accelerates upward at 3.80 m/s2 until it reaches an altitude of 1190 m. At that point its engines fail, and the rocket goes into free fall, with an acceleration of −9.80 m/s2. (You will need to consider the motion while the engine is operating and the free-fall motion separately.)