Mechanics | Relativity Answers

A richshaw driver moving with a speed of 36 km/ h,notices a child standing in the middle of the road and brings his rickshaw to rest in 4 sec.just in time to save the child.What is the average retarding force on the rickshaw? The mass of the rickshaw is 400 kg and the mass of the driver is 65 kg.

A 100 cm long string vibrates in 4 loops at 50 Hz.Linear density of the string is 0.0004 gm/cm.Calculate the tension in the string.

When an aircraft is moving in a horizontal plan at a constant speed of 650 m/s and its turning circle has a radius of 80 km.What is the ratio of the centripetal force to the weight of the aircraft?

Edward travels 150 kilometers due west and then 200 kilometers in a direction 60° north of west. What is his displacement in the westerly direction?

A car traveling at 30 m/s overcomes a frictional resistance of 100N while moving. Calculate the power developed by the engine. [1 hp = 0.75Kw
(a) 0.23hp (b) 0.40hp (c) 4.00hp (d) 4.40hp

A balloon is rising at a constant velocity of 3m/s. While the balloon is rising, something falls off. It takes 3s to hit the ground. What is the velocity when they hit the ground? How high was the balloon?

A truck of mass 2000 kg moving on a highway experiences an average frictional force of 800 N . If it's speed increases from 25 ms/s to 35 m/s over a distance of 500 m, what is the force generated by the truck .

A parked plane has a pe of 35456 j. If the plane is placed on a ramp that is 2.1m high to work on the wheels, what is the mass of the plane

Draw a sketch of the graph that best describes the relationship between the vertical distance an object falls from rest in frictionless conditions and the speed that it attains

A sinusoidal wave is describing by y (x,t)=3.0sin (3.52t-2.01x) cm where x is the position along wave propagation. Determine the amplitude, wave number, wavelength ,frequency &velocity of the waves.