Answer:
Explanation:
The train travels 5 miles in the east and then 2 miles in the west . Total path length is equal to 5 + 2 = 7 miles . But the displacement is (5 - 2 ) = 3 miles . So displacement ≠ path length
The jogger is running around a circular path . In moving one round on a circular path , path length is equal to the circumference of the circle but the displacement is zero because the starting point and finish point is same.
For the ball rolling down an inclined plane , path length is length of inclined path traveled and displacement is also the same . so in this case path length equals displacement.
For a ball thrown upwards and going downwards , total path length is equal to the total of path gone up and down or twice the height but the displacement is nil if the ball comes back again in the hand.
Answer:
Δx = 39.1 m
Explanation:
- Assuming that deceleration keeps constant during the braking process, we can use one of the kinematics equations, as follows:
where vf is the final velocity (0 in our case), v₀ is the initial velocity
(25 m/s), a is the acceleration (-8.0 m/s²), and Δx is the distance
traveled since the brakes are applied.
- Solving (1) for Δx, we have:
When a car hits you in a rear end collision, the car initially has a momentum going in one direction. This causes your car to move in the same direction that car was moving even if you were at rest. So, for conservation of momentum, you initially have momentum going in the east direction for example, after the collision, you will have a change in momentum which causes you to have a velocity in the west direction. This is because you are initially at rest and then there is a sudden change in velocity so when you speed up, that momentum causes you to move backwards. If you don't have a properly adjusted neckrest you could may experience whiplash.
So Neon ( Ne) is the correct answer.