Mechanics | Relativity Answers

Two cars begin driving towards each other's direction at 10:00 am . Car A: dA = 32.00 km/hr delta t
Car B: dB = 645.00km - 64.00 km/hr delta t
Part1: describe the motion in words
Part 2: graph
Part 3: show algebraically where the cars will pass each other. Is this consistent with your graph?

a ship leaves a port P and travels 30 km due north.then it changes course and travels 20 km in a direction 30 degrees east of north to reach port R.calculate the distance from P to R?

An elevator is moving at 1.5 m/s as it approaches its destination floor from below. When the elevator is a distance h from its destination, it accelerates with
a = −0.68 m/s2,
where the negative sign indicates a downward vertical direction. ("Up" is positive.) Find h.

Two boats start together and race across a 60-km-wide lake and back. Boat A goes across at 60 km/h and returns at 60 km/h. Boat B goes across at 30 km/h, and its crew, realizing how far behind it is getting, returns at 90 km/h. Turnaround times are negligible, and the boat that completes the round trip first wins. (a) Which boat wins and by how much? (Or is it a tie?) (b) What is the average velocity of the winning boat?

An engineer must design a runway to accommodate airplanes that must reach a ground velocity of 61 m/s before they can take off. These planes are capable of being accelerated uniformly at the rate of 2.5 m/s(2). How long will it take the planes to reach takeoff speed? What must be the minimum length of the runway?

max height and range of projectile are 300 metre and 800 metre respectivelly. What is the distance covered by projectle?

a golf ball weighs 0.45N is dropped from a height of 1.0m. assume that the ball has perfectly elastic collistion with the floor. what will the instantaneous momentum of the golf ball be immediately before it strikes the floor?

A uniform ladder of mass 10 kg leans against a smooth vertical wall making an angle of 53 with it.The other end rests on a rough horizontal floor,Find the normal force and the frictional force that the floor exerts on the ladder.

How much support force does a table exert on a book that weighs 15N when the book is placed on the table?

if a auto mobile of 1000 kg draw a engine with the speed 10m/s. then how many power will be ? the solution of this problem