Mechanics | Relativity Answers

The mechanical power output of a cyclist moving at a constant speed of 5.90 m/s on a level road is 105 W.

By bending low over the handlebars, the cyclist reduces the air resistance to 18.0 N. If she maintains a power output of 105 W, what will her speed be?

A plane weighing 233 kN lands on a aircraft carrier. The plane is moving horizontally at 69.6 m/s when its tailhook grabs hold of the arresting cabels. The cabels bring the plane to a stop in a distance of 84.0m. a) How much work is done on the plane by the arresting cabels in MJ? b) What is the force(assumed constant) exerted on the plane by the cabels?

A wheel is rorating in angular speed of 800 r.m on a shaft, whose moment of inertia is negligible. A second wheel initially at rest with twice moment of inertia of the first shaft is coupled to the same shaft.

(a) What is the angular velocity of the combined shaft and two wheels

(b) What is the change in rotational kinetic energy experienced by the system

Determine the displacement vector that must be added to the displacement(25i - 16j) metre to give a displacement of 7.0 metres pointing in the x+ direction

A ceiling fan blade is rotating at 1633 rpm . What is it's angular velocity in rad/s?

A string is 50.0 cm long and has a mass of 3.00 g. A wave travels at 5.00 m/s along this string. A second string has the same length, but half the mass of the first. If the two strings are under the same tension, what is the speed of a wave along the second string?

In watching a transverse wave go by, an observer notes that 13 crests go by in a time of 3.0 s. If the distance between two successive crest is measured to be 0.75 m, (a) what is the speed of the wave? (b) What is its period?

In a solid, it is possible to generate sound waves with different velocities dependent on the deformation mode Sound generating volumetric deformations (compression) and shear deformations (shearing) are caled pre Songtudu waves) and shear waves (transverse waves), respectively. The measured speed of longitudinal sound waves in one type of steel is about 5930 meters per second. What is this speed in kilometers per hour (km/h?)

a horizontal snowy road at a

A 25.0-kg sled is being pulled across constant velocity. The pulling force is parallel to the horizontal road and the coefficient of kinetic friction between the sled and snow is 0/1 . Determine the magnitude of the pulling force.

What is central force