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If a car moving with a speed of 30 m/s comes to a stop in 5 seconds, what is its
If a car moving with a speed of 30 m/s comes to a stop in 5 seconds, what is its deceleration?
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Practice Questions
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Q1
If a car moving with a speed of 30 m/s comes to a stop in 5 seconds, what is its deceleration?
2 m/s²
3 m/s²
4 m/s²
5 m/s²
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Deceleration = (final velocity - initial velocity) / time = (0 - 30) / 5 = -6 m/s².
Questions & Step-by-step Solutions
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Q
Q: If a car moving with a speed of 30 m/s comes to a stop in 5 seconds, what is its deceleration?
Solution:
Deceleration = (final velocity - initial velocity) / time = (0 - 30) / 5 = -6 m/s².
Steps: 7
Show Steps
Step 1: Identify the initial velocity of the car. The car is moving at 30 m/s.
Step 2: Identify the final velocity of the car. The car comes to a stop, so the final velocity is 0 m/s.
Step 3: Identify the time it takes for the car to stop. The car stops in 5 seconds.
Step 4: Use the formula for deceleration: Deceleration = (final velocity - initial velocity) / time.
Step 5: Plug in the values: Deceleration = (0 m/s - 30 m/s) / 5 s.
Step 6: Calculate the result: Deceleration = -30 m/s / 5 s = -6 m/s².
Step 7: Interpret the result. The negative sign indicates that the car is slowing down.
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