Question

a stone is dropped from a height of 30 m
(a)calculate the velocity at which it hits the ground
(b)calculate the time it will take to reach the ground ​

Answer 1

Answer:

sorry i don't no the answer of these questions so sorry

Answer 2

Answer:

a) 24.49

b) 2.449

Explanation:

Height = 30m

Height = 30minitial velocity = 0m/s

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)2gh= v²-u² (equations of gravity)

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)2gh= v²-u² (equations of gravity)2*10*30= v²-0

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)2gh= v²-u² (equations of gravity)2*10*30= v²-0600=v²

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)2gh= v²-u² (equations of gravity)2*10*30= v²-0600=v²24.49=v

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)2gh= v²-u² (equations of gravity)2*10*30= v²-0600=v²24.49=vv=u+gt

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)2gh= v²-u² (equations of gravity)2*10*30= v²-0600=v²24.49=vv=u+gt24.49=0+10*t

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)2gh= v²-u² (equations of gravity)2*10*30= v²-0600=v²24.49=vv=u+gt24.49=0+10*t24.49/10=t

Height = 30minitial velocity = 0m/s(because object is dropped so the initial velocity should be zero)g= 10 (for easier calculations)2gh= v²-u² (equations of gravity)2*10*30= v²-0600=v²24.49=vv=u+gt24.49=0+10*t24.49/10=t2.449 = t

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