Mechanics | Relativity Answers

Calculate the size of the stellar aberration effect in Newtonian physics for
light coming straight down at speed c and a telescope moving straight
sideways at speed v. At what angle θ must we point the telescope to see
the star? Hint: In what direction is the light moving in the reference frame
of the telescope? Express θ in terms of v and c.

A student pulls a 10 N block along a rough horizontal surface. The horizontal and the vertical components of the force that he applies are 4 N and 3 N, respectively.
What is the normal force?
If the block is in an impending motion, what is the value of the maximum static friction?
What is the coefficient of static friction?

Derive the relation between linear velocity and angular velocity

a block a mass 50kg slides down a plane inclined at an angle 30 to the horizontal. if the coefficient of friction is 0.4 calculate the frictional force btwn the two surfaces (g=10m/s)

Newton is out on his wind surfer that is made to go on ice. The coefficient of static friction is 0.2 and the coefficient of kinetic friction is 0.08. The total mass of him and the windsurfer is 120kg.
A) determine the force of static friction
B) determine the force of kinetic friction
C) The wind provides a force of 250N what is his acceleration when he first starts?
D) What is his acceleration after he gets moving?

An aeroplane taking off from the air strip has a runway of 600 m. What is its uniform acceleration if it leaves the ground in 15 seconds from the start? What is its take-off speed?

There are two identical shoe boxes on a table. You friend has put a brick in one of them. Describe how you could use one of Newton's laws to figure out which box is more massive without picking them up, or opening them, or using a scale.

A car travels with an average velocity of 60km/h how long does it take to cover a distance of 500km

A carnot engine has 50% efficiency when the sink temperature is 27°C . What is the increase in temperature of the heat source when its efficiency is 60%?

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A boy uses a rope attached to the top of a ceiling to swing to and fro .The lowest and highest point of the swing is 1.5 and 2.5 above the ground respectively .What is the boy's max speed