Projectile motion qn.. (1 Viewer)

[Kostie100]

 

[jmk123]

View attachment 28153

x''=0
x'=15sqrt2
x=15sqrt2t
y''=-10
y'=-10t+15sqrt2
y=-5t^2+15sqrt2t

When y=-10, t=4.67 (2dp)
so time of flight=4.67s

When t=4.67, x=99.08 (2dp), so distance travelled is 99.08m

I think thats right.

 

[Kostie100]

x''=0
x'=15sqrt2
x=15sqrt2t
y''=-10
y'=-10t+15sqrt2
y=-5t^2+15sqrt2t

When y=-10, t=4.67 (2dp)
so time of flight=4.67s

When t=4.67, x=99.08 (2dp), so distance travelled is 99.08m

I think thats right.

Yep thanks