Question

How far would a car move in 4.8 s if its velocity changed from 14.0 m/s to 16.0 m/s?

A. 0.48 meters
B. 1.6 meters
C. 4.8 meters
D. 9.6 meters

What is the displacement of a car accelerating from 15 m/s forward to 10 m/s forward in 8.0 s?
A. 25 meters
B. -25 meters
C. 5 meters
D. -5 meters

Apollo 10's re-entry speed was 39,897 km/h. How many seconds would it take the spacecraft to stop in a distance of 3.0 x 10^6 m?
A. 250 seconds
B. 900 seconds
C. 1500 seconds
D. 3600 seconds

The speed of light is 3.0 x 10^8 m/s. The speed of sound is 344 m/s. A flash of lightning occurs in a storm 1.0 x 10^3 m away. How many seconds does it take for us to see the lightning and hear the thunder?
A. 2.90 seconds
B. 2.90 x 10^3 seconds
C. 8.14 seconds
D. 8.14 x 10^8 seconds

How long will it take a laser beam to go to the moon and back if the distance to the moon is 3.8 x 10^8 m?
A. 0.25 seconds
B. 1.9 seconds
C. 7.6 seconds
D. 15.2 seconds

Jules Verne wrote a book called Around the World in Eighty Days. What was his average speed in m/s and km/h if the radius of the Earth is 6400 km?
A. 400 m/s and 1440 km/h
B. 800 m/s and 2880 km/h
C. 1600 m/s and 5760 km/h
D. 2000 m/s and 7200 km/h

What was the initial velocity of an object that moved 100 m in 5.60 s, reaching a final velocity of 15.0 m/s in that time? Was the object speeding up or slowing down?
A. 5.0 m/s, speeding up
B. 20.0 m/s, slowing down
C. 25.0 m/s, slowing down
D. 5.0 m/s, slowing down

If Donovan Bailey reaches a top speed from rest of 10.2 m/s in 2.5 s, what is his acceleration?
A. 2.04 m/s²
B. 4.08 m/s²
C. 10.2 m/s²
D. 25.5 m/s²

If a sprinter accelerates at 2.2 m/s² for 2.5 s, what is her velocity after this time assuming initial v=0 m/s?
A. 5.5 m/s
B. 2.2 m/s
C. 0.55 m/s
D. 11.0 m/s

If it takes 0.08 s for an airbag to stop a person moving 13.0 m/s and coming to a complete stop in that time, what is the acceleration of the person?
A. 162.5 m/s²
B. 65.0 m/s²
C. 130.0 m/s²
D. 325.0 m/s²

A fastball pitcher can throw a baseball at 100 km/h. If the windup and throw take 1.5 s, what is the acceleration of the ball?
A. 66.67 m/s²
B. 40.0 m/s²
C. 27.78 m/s²
D. 0.015 m/s²

A car moving at 10 m/s north ends up moving 10 m/s south after a period of 12 s, what is its acceleration?
A. 1.67 m/s² south
B. 0.83 m/s² south
C. 1.67 m/s² north
D. 0.83 m/s² north

Answer 1

The car would move a distance of 9.6 meters. The displacement of the car is 25 meters. It would take 1500 seconds for the spacecraft to stop.

Step-by-step explanation:

To find the distance a car moved, you can use the equation: distance = velocity x time. In this case, the initial velocity of the car is 14.0 m/s and the final velocity is 16.0 m/s. The time is given as 4.8 s.

Plugging in the values, we get: distance = (16.0 m/s - 14.0 m/s) x 4.8 s = 9.6 meters. Therefore, the car would move a distance of 9.6 meters.

For the displacement of a car accelerating from 15 m/s forward to 10 m/s forward in 8.0 s, we can use the equation: displacement = (initial velocity + final velocity) x time / 2.

Plugging in the values, we get: displacement = (15 m/s + 10 m/s) x 8.0 s / 2 = 25 meters. Therefore, the displacement of the car is 25 meters.

To calculate the time it would take for Apollo 10's spacecraft to stop in a distance of 3.0 x 10^6 m, we can use the equation: time = distance / velocity.

Plugging in the values, we get: time = 3.0 x 10^6 m / 39,897 km/h = 1500 seconds. Therefore, it would take 1500 seconds for the spacecraft to stop.