Answer:
Normal force of 10,000N
Explanation:
From the question, the weight the car exerts on the pavement is 10,000N.
The pavement exerts upward and perpendicular contact force called normal force on the car to support its weight. Also, the normal force is equal and opposite to the weigh of the car.
Hence the pavement exerts normal force of 10,000N back on the car to prevent it from passing through it.
Answer:
You have been hired as part of a research team consisting of ... Torque: After watching a news story about a fire in a high rise apartment building, you and your friend decide to design an emergency escape device from the top ... To avoid engine failure, your friend suggests a gravitational powered elevator.
Explanation:
This is amazing. When you read the quest ion, you wouldn't think there's enough information there to find an answer. But there is !
-- When the block is sliding along the flat surface, its kinetic energy is (1/2)(Mass·v²).
-- When it's 2.5m up the ramp and stops, its potential energy is (2.5m)·(Mass·g).
-- If there's no friction anywhere, these energies are equal.
(1/2)(Mass·v²) = (2.5m)·(Mass·g)
(v²/2) = (2.5m) · g
v² = 5m · g
v² = 49 m²/s²
<em>v = 7 m/s </em>(B)
Answer:
a)COP = 1.67
b) W = 300 J
Explanation:
given,
refrigerator removes = 500 J from a cold reservoir
discharge = 800 J to its hot reservoir
a) COP = 
COP = 
COP = 1.67
b) heat per cycle exhausted to the
W + 500 = 800
W = 800- 500
W = 300 J
