Mechanics | Relativity Answers

A truck on a straight road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed of 20.0 m/s. Then the truck travels for 20 s at a constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.00 s. (a) How long is the truck in motion? (b) What is the average velocity of the truck for the motion described?

What is friction?

he intensity, I, of an electromagnetic wave is related to the electric field strength E and magnetic induction B of the fields producing it by the equation I = E.B / 20 where 0 is the permeability of free space. Show that this equation is homogeneous.

A speedboat moving at 30.0 m/s approaches a ship 100 m ahead. The pilot slows the boat with a constant acceleration of -3.50 m/s2. How long does it take the boat to reach the ship?

A 50.0 g Super ball travelling at 25.0 m/s bounces off a brick wall and rebounds at 22.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.50 s, what is the magnitude of the average acceleration of the ball during this time interval?

On another planet, a marble is released from rest at the top of a high cliff. It falls 4.00 m in the first 1 s of its motion. Through what additional distance does it fall in the next 1 s?

Write down relationship between electric field and magnetic field (lorenz transformation).

a child fall from the wall of 100 m height after 1 sec superman saw him from the upper end of wall and fly with a constant speed what should be the speed of superman to caught him at the lower point of wall ?

What is maximum height expression for projectile motion.

After 3 days of hiking, a group of hikers are 30km north from their starting position. On the first day, they hiked 20km east; on the second day, they hiked 30km 53°N of W. Calculate their displacement on the third day.