Question

Can someone please help me with these ore lab questions. I added A,B, and C to hope help thanks

Pre-Lab Assignment Due at the beginning of Lab) that cover kinetic and potential energy Read over the lab and your textbook momentum and collisions then answer the following questions What effect does the force of gravity have on the horizontal velocity of the projectile? Explain. 1. What effect does air resistance and friction have on the velocity and range of a projectile? Why are we able to assume that their effect is insignificant in this experiment? 2. Which equation (or equations) and what parameters are needed to find the projectile's initial horizontal velocity in part A? 3. Which equation (or equations) and what parameters are needed to find the projectile's initial horizontal velocity in part B? 4. Which equation (or equations) and what parameters are needed to find the projectile's initial horizontal velocity in part C? 5. Define the following for an object with a mass m moving horizontally with a velocity v at a height h from the floor 6. a) Momentum (P) b) Kinetic energy (KE) c) Potential energy (PE) d) Mechanical energy For part C, explain what happens before, during and after the collision? 7.

Answer 1

Force of gravity does not change the horizontal component of velocity it only change the vertical component of velocity.

Air drag is directly proportional to the velocity of projectile so it reduces the horizontal component of velocity which reduces the range of the projectile ,in this experiment horizontal component or the velocity with which projectiles are launched is less so air drag is also less and negligible.

Initial velocity of projectile can be found using equation 9 and 10 where range and angle of projection of the projectile are two parameters.

I am not clear what you mean by part A B C

For an object moving with velocity v at height h

momentum = mv

KE =

Force of gravity does not change the horizontal component of velocity it only change the vertical component of velocity. Air drag is directly proportional to the velocity of projectile so it reduces the horizontal component of velocity which reduces the range of the projectile, in this experiment horizontal component or the velocity with which projectiles are launched is less so air drag is also less and negligible. Initial velocity of projectile can be found using equation 9 and 10 where range and angle of projection of the projectile are two parameters. I am not clear what you mean by part A B C For an object moving with velocity v at height h momentum = mv KE = 1 mv^2/2 PE = mgh Mechanical energy is sum of KE and PE

PE = mgh

Mechanical energy is sum of KE and PE