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If a net force of 7 N was constantly applied on 400 g object at rest, how long will it take to raise its
velocity to 80 m/s?
a) 0 s b) 2.23 s c) 3.47 s d) 4.57 s?
Most Upvoted Answer
If a net force of 7 N was constantly applied on 400 g object at rest, ...
Given Data
- Net Force (F): 7 N
- Mass (m): 400 g = 0.4 kg
- Final Velocity (v): 80 m/s
- Initial Velocity (u): 0 m/s
Step 1: Calculate Acceleration
To find the acceleration (a), use Newton's second law of motion:
  • F = m * a
  • 7 N = 0.4 kg * a
  • => a = 7 N / 0.4 kg = 17.5 m/s²


Step 2: Use the Equation of Motion
We need to find the time (t) it takes to reach the final velocity using the formula:
  • v = u + a * t
  • 80 m/s = 0 m/s + 17.5 m/s² * t


Step 3: Solve for Time
Rearranging the equation to find time (t):
  • 80 m/s = 17.5 m/s² * t
  • => t = 80 m/s / 17.5 m/s²
  • => t ≈ 4.57 s


Conclusion
The time it will take to raise the object's velocity to 80 m/s is approximately:
  • d) 4.57 s

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If a net force of 7 N was constantly applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s?a) 0 s b) 2.23 s c) 3.47 s d) 4.57 s?
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If a net force of 7 N was constantly applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s?a) 0 s b) 2.23 s c) 3.47 s d) 4.57 s? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about If a net force of 7 N was constantly applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s?a) 0 s b) 2.23 s c) 3.47 s d) 4.57 s? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If a net force of 7 N was constantly applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s?a) 0 s b) 2.23 s c) 3.47 s d) 4.57 s?.
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