Asked by Tomtom

1. A 1000kg car moving at 10m/s brakes to a stop in 5s. The average braking force is...........N?
A. 1000
B. 2000
C. 4000
D. 5000

2. A 20kg mass is held 4m above the ground. What is the approximate potential evergy of the mass with respect to the ground?
A. 5J.
B. 50J
C 80J
D. 800J

3. A TV set is pushed a distance of 2m with a force of 20 N that is in the same direcion as the set moves. How mauch work is done on the set?
A. 10J
B. 20J
C. 40J
D. 80J

Answered by drwls
A. Impulse (Force x time) equals momentum change (velocity x mass)
Solve for the force

B. P.E. = M g H

C. Work = force x distance

You should know these formulas. You can do the calculations in your head.
Answered by desk
a
c
d
There are no AI answers yet. The ability to request AI answers is coming soon!