3 years ago

Laura is skydiving when at a certain altitude she opens her parachute and

Physics

1 answer:

sukhopar [10]3 years ago

7 0

Answer:

Explanation:

The motion is under a constant velocity which means she has no acceleration.

So we can use,

Velocity = displacement/ time taken

Displacement = velocity× time taken

= 6.5×34 = 221m

We consider distance she fall as displacement as she doesn't change her direction.

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Alexxandr [17]

C.joined forces

your answer

7 0

3 years ago

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||||| A ball on a porch rolls 60 cm to the porch’s edge, drops 40 cm, continues rolling on the grass, and eventually stops 80 cm

3241004551 [841]

Answer:

$d = 145.6 cm$

Explanation:

first ball rolls on the porch by total distance

$x_1 = 60 cm$

Then again it will move on horizontal floor

$x_2 = 80 cm$

also in vertical direction it will drop down

$y = 40 cm$

so we have

$x = 60 + 80$

$x = 140 cm$

$y = 40 cm$

so magnitude of net displacement of the ball is given as

$d = \sqrt{140^2 + 40^2}$

$d = 145.6 cm$

8 0

3 years ago

If a system requires 150 j of input work and produces 123 J of output work, whats its effiency

Yuki888 [10]

The effiency of a machine is

(output work or energy) / (input work or energy) .

For the system described in the question, that's

(123 J) / (150 J) = 0.82 = 82% .

4 0

3 years ago

A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw

Alona [7]

Answer:a

Explanation:

4 0

3 years ago

7. 100 Joules of work was done to move an object with a force of 15 N. How far did the

worty [1.4K]

Answer:Distance=6.67 (rounded)

Explanation: Work = Force x Distance.

100 Joules of work= force of 15 N x Distance (?)

The work equation given above can be rearranged to find force or distance if the other variables are known:

Distance=Work / force

Distance=100Joules/15 N

Distance=6.67 (rounded)

7 0

3 years ago