30 POINTS AVAILABLE 30 POINTS AVAILABLE

1)  acceleration  = 1.3  

2)  acceleration = 26.1

3)  acceleration = 2.5

4) Final velocity = 13 m/s

5) Time = 0.7  seconds

Explanation:

1) First question:

Acceleration can be calculated based on the formula:

which rounded to one decimal is: 1.3 m/s^2

2) Second question:

Use the formula that relates final and initial velocity with acceleration and distance covered:

which rounded to one decimal gives:

acceleration = 26.1

3) Third question :

The marble rolls down 5 meters in 2 seconds, so we use the distance covered formula under constantly accelerated motion:

4) Fourth question:

Use the formula

5) Fifth question:

First calculate the acceleration :

Now we can find the time it takes the car to reach a speed of 4 m/s via the formula:

which rounded to one decimal gives:

time = 0.7  seconds