Mechanics | Relativity Answers

9. A cat moves from its resting spot under a tree to a nearby building to shelter from the rain. If it

took 5 seconds for the cat to travel and the displacement of the tree to the building is 167 meters

NW, what was its average velocity?

solution please

10. The equation for the velocity of an airplane slowing to a stop to the East on an airway is

𝑣⃗(𝑡) = 70𝑚/𝑠²

𝑡 − 44𝑚/𝑠³ 𝑡² . Derive the formula for its instantaneous acceleration and find the velocity when t=1s.

Newton's Second Law of Motion

Show your solution.

A truck hauls a car cross-country. The truck's mass is 4.00x10 ³kg and the car's mass is 1.60x10 ³kg. if the force of propulsion resulting from the truck's turning wheels is 2.50x10à ¢  ´N, then determine the acceleration of the car (or the truck) and the force at which the truck pulls upon the car. Assume negligible air resistance forces.

If a bag weighs 10kg and the coefficient against the ground is 0.5.The angle between the rope and ground is 20. How much extra force is needed to pull this bag behind himself

A box of mass 2.5 kg is pulled up a ramp by a rope at a constant speed. The angle of inclination of the ramp is 15° and the coefficient of kinetic friction of the ramp is 0.28. The rope is parallel to the ramp. Find the tension in the rope. 

a motorist traves from a town a to a town b,145km distance in 3hrs 45 mins . find his average speed. in km\h

by seeing a child on a railway track the driver applies brakes the speed of train is reduced from 90 km/h to 36km/h in 5s then train retards by

A plane flies 955 km due east,then turns to north and flies another 649 km. Determine the polar coordinates of the plane's finam position