Projectile motion

Question 1

What do we assume when doing porjectile motion calculations

Answer 1

That there is no air resitance

Question 2

What happens to vertical motion when object thrown from ground level upwards

Answer 2

The velocity velocity changes due to acceleration of free fall

Question 3

What is the accelaration here?

Answer 3

acceleration due to gravity, first part of projectile from ground level -9.81ms-1.

9.81ms-1

Question 4

How many parts is a objects projectile graph divided into when it is thrown from ground level

Answer 4

2 parts

Question 5

How many parts is a objects projectile graph divided into when it is thrown from above ground level, eg. cliff

Answer 5

3 parts.

Question 6

Is the final velocity in horizonatal 0 in porjectile motion?

Answer 6

Never, it is the velocity at which the object hits target, so its same throughout.

Question 7

Why does horizontal velocity of projectile remain constant

Answer 7

Aceleration of free fall is vertically downwards, this component of this acceleration in horizontal direction is 0.

Question 8

what trig to use for uy

Answer 8

sin theta x velocity

Question 9

what trig to use for Ux

Answer 9

cos tehta x velocity

Question 10

what force is acting on projectile when flying

Answer 10

Weight acting on it straight down

Question 11

What is a projectile

Answer 11

Object which is initially projected by a force, continues to move freely under influency of gravity.

Question 12

What equipment must not be involved for a projectile motion

Answer 12

No motors or engines

Question 13

According to free fall, will a 10g object hit the ground before a 5g object, if distance is the same for both above the ground.

Answer 13

No because, we assume no air resistance, therefore they will have same acceleration, therefore theyll land at the same time.