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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 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 ?
A 10 KG BLOCK LIES ON A FRICTIONLESS HORIZONTAL SURFACE.
A. WHAT FORCE WILL GIVE IT AN ACCELERATION OF 500 CM/S2 ?
B. WHAT CONSTANT FORCE WILL GIVE THE SAME BODY A VELOCITY OF 2 M/S AFTER 1 S ?
A 2.5 KG MASS AND A 4 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
A 5000 KG TRUCK IS RUNNING AT 72 KPH.
a. ) IF IT IS TO BE STOPPED BY A CONSTANT RETARDING FORCE IN 10 S. WHAT IS THE DECELERATION ?
b ) WHAT IS THE RETARDING FORCE ?
#331389 on Nov 2022