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A 0.5 kg ball moving with speed of 12 m/s strikes a hard wall at an angle of 30° with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.25 seconds, the average force acting on the wall is[2006]
  • a)
    24 N
  • b)
    12 N
  • c)
    96 N
  • d)
    48 N
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A 0.5 kg ball moving with speed of 12 m/s strikes a hard wall at an an...
Resolving the velocities in vertical and horizontal directions, resolved parts of first velocity
v cosθ perpendicular to the wall and v sinθ parallel to the wall. In the second case, they are –v sinθ & v cosθ respectively. Here, –ve sign is because direction is opposite to the earlier ones. So we see a net change in velocity perpendicular to way = v sinθ – (–v sinθ) = 2v sinθ
This change has occured in 0.25 sec, so, rate  of change of velocity
Thus, acceleration a = 48 m/sec2
Force applied = m . a = 0.5 × 48 = 24 N
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A 0.5 kg ball moving with speed of 12 m/s strikes a hard wall at an an...
Resolving the velocities in vertical and horizontal directions, resolved parts of first velocity
v cosθ perpendicular to the wall and v sinθ parallel to the wall. In the second case, they are –v sinθ & v cosθ respectively. Here, –ve sign is because direction is opposite to the earlier ones. So we see a net change in velocity perpendicular to way = v sinθ – (–v sinθ) = 2v sinθ
This change has occured in 0.25 sec, so, rate  of change of velocity
Thus, acceleration a = 48 m/sec2
Force applied = m . a = 0.5 × 48 = 24 N
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A 0.5 kg ball moving with speed of 12 m/s strikes a hard wall at an an...
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A 0.5 kg ball moving with speed of 12 m/s strikes a hard wall at an angle of 30° with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.25 seconds, the average force acting on the wall is[2006]a)24 Nb)12 Nc)96 Nd)48 NCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A 0.5 kg ball moving with speed of 12 m/s strikes a hard wall at an angle of 30° with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.25 seconds, the average force acting on the wall is[2006]a)24 Nb)12 Nc)96 Nd)48 NCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 0.5 kg ball moving with speed of 12 m/s strikes a hard wall at an angle of 30° with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.25 seconds, the average force acting on the wall is[2006]a)24 Nb)12 Nc)96 Nd)48 NCorrect answer is option 'A'. Can you explain this answer?.
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