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An elevator cab that weighs 27.8 kN moves upward. What is the tension in the cable if the cab’s speed is ___.
Find the mass of the elevator:
a. At rest
b. Uniform motion
A truck of 2945kg has a velocity of 8.30 m/s and comes to a stop in 15.0 s. Find its final momentum.
1. A particle of charge 3x10-3 C is located at point (0, 0) in a coordinate system. Assuming all lengths are in meters, calculate the potential at the following points: A (3, 3) and B (0, 2). How much work is needed to take a particle of charge 2x 10-* C from point A to point B?
a satellite of mass 200 kg is displaced by a distance of 2 Rs gift from a point on the earth surface where R is the radius of the earth calculate the work done on the satellite by the force of gravity take the values of constant is in given your call calculation from instead of physical data given in the course
A ball of mass 100g strikes a wall with the speed 2m/s and the bounces off the wall in the opposite direction with the same speed calculate the impulse of the ball
Relation between group velocity and phase velocity
A 100 KG WOODEN CRATE IS AT REST ON A LEVEL STONE FLOOR WITH COEFFICIENT OF FRICTION OF 0.5 .
A. WHAT IS THE MINIMUM HORIZONTAL FORCE NEEDED TO START THE CRATE MOVING ?
B. WHAT IS THE MINIMUM HORIZONTAL FORCE NEEDED TO KEEP THE CRATE IN MOTION AT CONSTANT SPEED WHERE THE COEFFICIENT OF KINETIC FRICTION IS 0.4 ?
A 2 KG MASS AND A 3 KG MASS ARE ATTACHED TO A LIGHT WEIGHT CORD THAT PASSES OVER A FRICTIONLESS PULLEY. THE HANGING MASSES ARE LEFT FREE TO MOVE. FIND THE
A. ACCELERATION
B. TENSION OF THE CORD
AN ELEVATOR THAT WEIGHS 3000 N IS ACCELERATED UPWARD AT 1 M/S2. WHAT FORCE DOES THE CABLE EXERT TO GIVE IT THIS ACCELERATION ?
A RACE CAR HAS A MASS OF 710 KG. IT STARTS FROM REST AND TRAVELS 40 M IN 3 S. THE CAR IS UNIFORMLY ACCELERATED DURING THE ENTIRE TIME. WHAT NET FORCE IS APPLIED TO IT ?
