Mechanics | Relativity Answers

Box A, mass 12kg is tied to box B, mass 15kg, by a rope. Box A is pulled away from B with a force of 35N. Once moving, A experiences a force of frictions of 11N and B of 14N. What is the force of tension in the rope between the boxes?

A car with 60 cm diameter tires is traveling at a constant speed of 100 km/hr. What is the angular velocity of the tires in rad/s?

why it is easier to pull than push a roller

when the speed of a body is doubled and the mass is reduce to half
A. its kinetic energy is doubled
B. its potential energy is doubled
C. its rest energy is doubled
D. its momentum is doubled
E. its mechanic energy is doubled

if radius of a circle in which an object is moving at constant speed is doubled and the mass of the object is also doubled. the resulted centripetal force will be?
A. one quarter as great as before
B. one half as grid as before
C. remain constant
D. twice as great as before
E. four times as great as before

if v is the velocity of a body moving along x-axis , then what is the acceleration

a body is initially at rest.it undergoes one dimensional motion with constant acceleration.the power delivered to it at the same time t is proportional to?

The acceleration of moon with respect to earth is 0.0027 m/s2 and the acceleration of an apple falling
on earth’s surface is about 10 m/s2
. Assume that the radius of the moon is one fourth of the earth’s
radius. If the moon is stopped for an instant and then released, it will fall towards the earth. The initial
acceleration of the moon towards the earth will be

a car travelling at a speed of 54km/h is bought to rest in 90 seconds find the acceleration and distance travelled by car before coming to rest

a car goes from 'A' town to 'B' town with speed of 40 km/hr & returns back to town 'A' with speed of 60km/hr. calculate avrage speed & avrage velocity of the car