## Kumar Ketan is teaching live on Unacademy Plus

Kumar Ketan Follow Hey, this is kumar Ketan. I'm graduate in physics and doing further studies. I would love to teach you and give you all my knowledge. 283 Views in last 30 days 1,178 Lifetime Views 5 Courses 460 Followers Following Course Overview Course Overview , For which diode is used a) Modulation b) Oscillation c) Amplification d) purification Expected topics of General Expected topics of General Science Awareness for UPSC CSE/SSCfor Railway Group C & D with some Railway with some details details VOTE enroll VOTE enroll By Kumar Ketan By Kumar Ketan By Kumar Ketan (Hindi) General Awareness: Most Important 50 Question for.. (Hindi) Most Important 100 General Science Questions: Railway... (Hindi) Previous Years Questions asked in UPPSC/SSC 6 Lessons 8 Lessons 25 Lessons https://unacademy.com/user/Kumarketan

Problems Of Collision 2

Example 1 at rest on ice. They move together after the collision at 2.4 m/s. Find the velocity of the skater B before the collision. An 87-kg skater B collides with a 22-kg skater A initially Common speed after Vr= V,-Vc = 2.4 m/s colliding: 2.4 m/s. ul BL B .A BC 87 kg B (87 kg)uB (87 kg + 22 kg)(2.4 m/s) 22 kg (87 kg) -262 kg m/s 11,-3.01 m/s

Exampie 2. at rest. The velocity of block afterward is 40 m/s. The bullet passes through the block and emerges with what velocity? A 0.150 kg bullet is fired at 715 m/s into a 2-kg wooden block (0.150 kg)vA (2 kg)(40 m/s) (0.150 kg)(715 m/s) 0.150v(80 m/s) (107 m/s) 0.150v 27.2 m/s) 27.2 m/s 50 VA 181 m/s

Example 3: the way through, then lodges into the 2 kg block. Afterward, the 1 kg block moves at 1 m/s and the 2 kg block moves at 2 m/s. What was the entrance velocity of the bullet? A 50 g bullet strikes a 1-kg block, passes all 2 kg UA? I kg 1 m/s 2 m/s 1 kg kg

Find entrance velocity of bullet: mA 0.05 kg; u4? Momentum BeforeMomentum After mAHA (0.05 kg)u (1 kg)(1 m/s)+(2.05 kg)(2 m/s) (0.05 kg) u (5.1 kg m/s) u- 102 m/s