Elastic Collisions Video Lessons

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Problem: A 1.0-kg ball is attached to the end of a 2.5-m string to form a pendulum. This pendulum is released from rest with the string horizontal. At the lowest point in its swing when it is moving horizontally, the ball collides elastically with a 2.0-kg block initially at rest on a horizontal frictionless surface. What is the speed of the block just after the collision?

FREE Expert Solution

In this problem, we are dealing with an elastic collision. The following equations will be useful:

Final velocity after a collision:

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Problem Details

A 1.0-kg ball is attached to the end of a 2.5-m string to form a pendulum. This pendulum is released from rest with the string horizontal. At the lowest point in its swing when it is moving horizontally, the ball collides elastically with a 2.0-kg block initially at rest on a horizontal frictionless surface. What is the speed of the block just after the collision?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Elastic Collisions concept. You can view video lessons to learn Elastic Collisions. Or if you need more Elastic Collisions practice, you can also practice Elastic Collisions practice problems.