What is rhe average velocity od a baseball dropped from rest that falls for 2 seconds?

Physics

1 answer:

SOVA2 [1]3 years ago

3 0

Answer:

19.6m/s

Explanation:

Given parameters:

Initial velocity = 0m/s

Time = 2s

Unknown:

Average velocity = ?

Solution:

We can use the final velocity of the ball before landing to determines its average velocity ;

Using;

v = u + gt

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity

t is the time

v = 0 + 9.8 x 2 = 19.6m/s

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A truck travels to and from a stone quarry that is located 2.5km to the east.

Harrizon [31]

Answer:

Distance is 5.0 km and displacement is 0 km.

Explanation:

The diagram is shown below.

Distance is the total length that the truck covers along the complete journey. The truck moves from a stone quarry covering a length of 2.5 km and then again come back to the same point and thus covering another 2.5 km. Therefore, the total length covered by the truck is the sum of forward and backward paths which is equal to 5.0 km.

Now, displacement depends only on the initial and final position. It is given as the difference of final position and initial position. So, the truck starts from stone quarry and returns back to the same position. So, the initial position and final position is same. Therefore, the difference is 0 and hence displacement is zero.