Experiment 2: Conservation of Enersgy Data Tables and Post-Lab Assessment Table

Question

Experiment 2: Conservation of Enersgy Data Tables and Post-Lab Assessment Table 1: Bounce Back Height for Various Objects Trial 3 Average Height (m) Ball Type Trial 1 Trial 2 Ping Pong Ball 03 02 0.2 0r32 oa Tennis ball 0.39 | 0.33 ?.?. | 0.3? 10.0 Post-Lab Questions Use Table 2 to calculate the potential and kinetic energy of each ball during different stages of it motion. Record your data in Table 3, 1. Table 2: Mass of Common Types of Sports Balls Ball Type Mass (kg) 0.0027 Ping Pong ball 0.042 Racquetball 0.045 Golf ball 0.057 Tennis ball Soccer ball Basketball 0.43 0.62

Explanation / Answer

Formulae Used:

Theory Behind :

When a bouncing ball falls, it initially gains speed or kinetic energy—the energy of motion. When it reaches Earth, it collides head-on with an incredibly massive object that is, from your perspective, at rest. The ball slows down, deforms temporarily and shoots back up. The air in the ball acts like a spring—it gets compressed and expands again. During the collision, some of the ball's energy is converted into heat. As a consequence, the ball shoots up with less energy than it had when it reached Earth.

Bounce Back Height Trial 1 Trial 2 Trial 3 Avg Ping Pong Ball 0.28 0.31 0.28 0.29 Tennis Ball 0.3 0.29 0.32 0.30 Yellow Ball 0.33 0.28 0.3 0.30 Mass In Kg Ping Pong Ball 0.0027 Tennis Ball 0.057 Yellow Ball 0.083 Ball type PE at 0.5m KE Before Bouncing PE at New max Height Thermal Energy KE After bounce PE at bottom Velocity Pin Pong Ball 0.01323 0.00000 0.00767 0.01879 0.00767 0.02646 2.38 Tennis Ball 0.27930 0.00000 0.16944 0.38916 0.16944 0.55860 2.44 Yellow Ball 0.40670 0.00000 0.24673 0.56667 0.24673 0.81340 2.44

Formulae Used:

Thermal Energy = Potential energy during Hitting(on ground) - KE After Bouncing Back PE at 0.5m = mass of ball * g * 0.5m PE at max height = mass of ball * g * Average height from the trials KE after bounce = 0.5 * mass * velocity * velocity Velocity = sqrt(2 * g * Average height

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