Best Answer

The final velocity of a falling object can be worked out by the use of the formula a = (v - u)/t a = acceleration due to gravity = 9.8 m.s-2 v = final velocity = unknown u = initial velocity = 0 t = time taken = 3.5s Factor these known values into our equation 9.8 = (v - 0)/3.5 rearrange the formula to workout the unknown value v = 9.8 x 3.5 Final velocity on impact with valley floor = 34.3 m.s-1 with a downwards direction

More answers

Lvl 1

9.8 m/s

Q: If rock at rest falls off a cliff and hits the valley below after 3.5 seconds what is the rocks velocity as it hits the ground?

Write your answer...

Submit

Still have questions?

Continue Learning about Physics

160 feet per second

You can measure acceleration by using this formula below. vf= final velocity vi= initial velocity t=time a=accelration vf-vi/time

Distance travelled (displacement). Distance = velocity/time, so velocity * time = distance. Likewise, x = dv/dt so the integral of velocity with respect to time (area under the graph) is x, the distance travelled.

H = H0 + V0T + 1/2 G T2H0 = 150 mV0 = -800 sin(30) = -400 m/sG = -9.8 m/s2We want 'T' when H=0 .0 = 150 - 400 T - 4.9 T2T = [ 400 Â± sqrt(160,000 + 2,940) ] / -9.8T = -82.01 secT = 0.3733 secThe physically meaningful root isT = 0.3733 seconds (rounded)

Observe that the object below moves in the negativedirection with a changing velocity. An object which moves in the negative direction has a negative velocity. If the object is speeding up then its acceleration vector is directed in the same direction as its motion (in this case, a negative acceleration).

Related questions

Depends on the nature of the explosion, the height of the explosion.

It reaches terminal velocity. The speed is limited by the air resistance of the object. In most cases, terminal velocity is reached in a few seconds.

128

A Swede grows below ground.

I have hollows in my face, just below the cheekbones. But it could also mean a low-lying area of ground, like a shallow valley or glen. See the related link, listed below, for more information:

death valley 282 feet below sea level

Below ground, just like a carrot.

Below ground

How deep below the peak is the valley marking the center of the ridge

How deep below the peak is the valley marking the center of the ridge

How deep below the peak is the valley marking the center of the ridge

Pecos Bill created Death Valley in California when he finally fell off the tornado. He hit the ground so hard, it sank below sea level and created Death Valley.