The document you uploaded is an acceleration worksheet. Here's a breakdown of the questions from the worksheet, along with hints for solving them:

1. A bus traveling at 4.8 m/s decelerates at 2.4 m/s². Calculate the time taken for the bus to come to a complete stop.

   • You can use the formula $v_f = v_i + at$, where:
     • $v_f = 0$ (since the bus comes to a stop),
     • $v_i = 4.8 \, \text{m/s}$,
     • $a = -2.4 \, \text{m/s}^2$. Solve for $t$.

2. A jet lands on an aircraft carrier at 30 m/s. What is its acceleration if it stops in 2.0 s?

   • Use the same formula $v_f = v_i + at$, with:
     • $v_i = 30 \, \text{m/s}$,
     • $v_f = 0$,
     • $t = 2.0 \, \text{seconds}$. Solve for $a$.

3. Velocity-time graph of a car:

   • a. Estimate the car's speed after 30 seconds using the graph.
   • b. Find the acceleration of the car between 20 and 40 seconds by calculating the slope of the graph in that interval.

4. Velocity-time graph of a sprinter:

   • a. Find the sprinter's acceleration between 0 and 20 seconds.
   • b. Estimate the sprinter's speed after 8 seconds using the graph.
   • c. Determine the period when the sprinter’s speed was constant by looking for flat segments on the graph.

5. Journey of a car between two traffic lights:

   • a. Find the car’s maximum speed in meters per second (estimate from the graph).
   • b. Find the car’s acceleration in the first 4 seconds by calculating the slope of the graph.

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Would you like me to walk through any specific calculations or provide more details? Here are five related questions you might find useful:

1. How do you calculate the total distance traveled from a velocity-time graph?
2. What is the difference between constant speed and constant acceleration?
3. How can you tell from a graph when an object is decelerating?
4. What is the physical meaning of the slope in a velocity-time graph?
5. How would increasing the mass of the bus in question 1 affect the time to stop?

Tip: Always check units in physics problems; consistent units lead to correct results!