#### axwe7

##### Member

- Joined
- Aug 4, 2015

- Messages
- 183

- Gender
- Undisclosed

- HSC
- N/A

An astronaut on the moon drops a golf ball to determine the acceleration due to gravity. The time taken to fall through 1.2 m is 1.2 s. Determine the acceleration due to gravity on the moon.

I know that a = (v-u)/t

However the numerator states values based on velocity. Hence we should first use - V = s/t

s = 1.2

t = 1.2

Therefore Velocity = 1 ms-1, initial velocity @ astronaut = 0ms-1.

Therefore,

a = (1-0)/1.2

= 0.8333...

It's incorrect...

Regards,

Axwe7.

I know that a = (v-u)/t

However the numerator states values based on velocity. Hence we should first use - V = s/t

s = 1.2

t = 1.2

Therefore Velocity = 1 ms-1, initial velocity @ astronaut = 0ms-1.

Therefore,

a = (1-0)/1.2

= 0.8333...

It's incorrect...

**The answer is 1.6ms-1**.**What am I doing wrong and what is method should be used to answer this question?**Regards,

Axwe7.

Last edited: