A ball is dropped from a building. The distance, D metres, that it falls in t seconds is given by D=5tsquared

Find the distance fallen in 3 seconds

Find the time taken to fall 100 metres (answer to 1 decimal place)

Question

A ball is dropped from a building. The distance, D metres, that it falls in t seconds is given by D=5tsquared

Find the distance fallen in 3 seconds

Find the time taken to fall 100 metres (answer to 1 decimal place)

danjs · Answer

given:
$$Distance = 5*(time)^2$$

that right?

danjs · Answer

$$D(t) = 5*t^2$$

danjs · Answer

For the first part, uses time = 3  and solve for D

For the second, use D=100, solve for time t

raphaelll · Answer

No, D = 5t squared

danjs · Answer

that is what i typed
$$D = 5t^2$$
"D euals 5 tee squared"

danjs · Answer

TO find the distance fallen in 3 seconds, put t=3, solve for D=5*3^2

to find the time to fall 100 meters put,  100 = 5*t^2, solve for t

raphaelll · Answer

ah i see thank you i've got it