Solar energy is the most abundant energy resource on earth.
<span>The overall force that is acting on the bottle is gravity. With the incline being 30 degrees the full force of gravity isn't acting on the bottle becuase the ramp isn't allowing the bottle to go straight down. By taking the sin of 30 degrees you find the proportion of gravity that is acting on the bottle to be 4.9 meters per second and the bottle weights 20 kg so the force acting on the bottle is 98 Newtons.</span>
Answer:53.3m/s
Explanation:
time for first travel
time=distance/speed
time=40/80
time=0.5seconds
time for second travel:
time=distance/speed
time=40/40
time=1seconds
total time=0.5+1
total time=1.5seconds
Then average speed for 80km trip:
Speed=distance/time
Speed=80/1.5
Speed=53.3m/s
<span>We can draw a free body diagram for one of the boxes.
There are two forces acting on the box.
The downward force is the force of gravity which is 50 N.
The upward force is the force from the tension in the rope.
Since the box is suspended, it is not accelerating.
Therefore, the net force must be zero.
Therefore the tension in the rope must be 50 N.</span>
