Mechanics | Relativity Answers

A 0.10 Kg model rocket’s engine is designed to deliver an impulse of 6.0 N·s. If

the rocket engine burns for 0.75 s, what is the average force does the engine

produce?

Find the center of mass of four 2kg bodies placed at eachcorner of a square

of side 1.5 m.

Maskbyte is the furthest star from earth. It has a mass of 0.123 times the mass of planet Mekaverse. Calculate the orbital radius and velocity of a planet which has a measured orbital period of 20.4 days!

A 600-kg car is going around a curve with a radius of 120 m that is banked at an angle of 20° with a speed of 24.5 m/s. What is the minimum coefficient of static friction required for the car not to skid?

 A particle moving along the x axis . It’s position varies with time according to x(t)=-4t+2t^2

a) Find the average velocity between t=0s and t=2s

b) Find the average speed of the particle between t=0s and t=2s

1.             A fish swimming in a horizontal plane has velocity v_i = (4.00i + 1.00j ) m/s at a point in the ocean where the position relative to a certain rock is r_i = (10.0i - 4.00j) m. After the fish swims with constant acceleration for 20.0 s, its velocity is v_f = (20.0i - 5.00j) m/s.

(a) What are the components of the acceleration?

(b) If the fish maintains constant acceleration, where is it at t =25.0 s?

A projectile is fired in such a way that its horizontal range is equal to its maximum height. What is the angle of projection?

A projectile is fired in such a way that its horizontal range is equal to its maximum height. What is the angle of projection?

A 2kg body lies on a smooth surface. it is being pulled to the right by an 80N force and to the left by a 50 N force

A 20 kg object is hangs at the end of a 3.0 m horizontal rod of mass 5.0 kg that is hinged to a pole as shown in figure below. To support the hanging object, a cable is tied at an angle 55⁰ at the middle of the rod. If the cable breaks, find the magnitude and direction of angular acceleration of this system.