Answer:
The displacement can be calculated by measuring the area of the curve when we move along the t curve. So, that would give the displacement.
Explanation:
Hey there friend :)
I would go with Choice A
Sorry if wrong :(
Have a Fabulous day!
Answer:
Same work is done by the two workers
The first worker exerts more power than the second person
Explanation:
Work is the product of force and distance moved in the direction of the applied force
Power is the rate at which work is done
Answer:
Part a)

Part b)

Part c)

Explanation:
Part a)
As we know that the gravitational force is given as

so we will have to find the ratio of force on two planets due to star
so here we have



Part b)
Orbital speed is given as

so the ratio of two orbital speed is given as


Part c)
Time period is given as

so the ratio of two time period is given as



The easiest way to answer this question is by realizing there are relating the velocities of the two cars. To tackle this problem, you have to understand the picture. Car 1 travels at 35m/s and Car 2 travels at 25m/s. Based on relative velocities, we can understand that Car 1 travels 10m/s faster than Car 2 every second. So we can interpret Car 1's relative velocity to Car 2 as 10m/s. Car 1 needs to travel 10m/s till a point of catching up to Car 2 which is 462m away.
v = 10m/s
d = 462m
v = d/t
(10) = (462)/t
t = 46.2s
So it takes 46.2 seconds for Car 1 to catch up to Car 2, but the question is asking how far does Car 1 travel to catch up. So we have to use Car 1's velocity and not the relative velocity:
v = 35m/s
v = d/t
(35) = d/(46.2)
d = 1617m
Car 1 traveled a total distance of 1617m.