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3 years ago

Unless an object at rest is acted upon by a force, it stays at rest due to its

1 answer:

4 0

There are a lot of things about this whole statement that bother me,
but I'm pretty sure you're not interested in those. You just want a word
to glue onto the end and complete the statement. OK. Use "inertia".

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A child who is swimming toward shore at 0.78 m/s sees shark and picks up his speed

Gnoma [55]

Answer:

0.085m/s²

Explanation:

Use v²=v0²+2a(d)

solve for a

v²-v0²/2d=a

Plug in givens

1.89²-0.78²/2*17.5=a

Plug into calculator

a=0.085m/s²

3 0

3 years ago

a 0.15 kg baseball has a momentum of 0.78 kg*m/s just before it lands on the ground. What was the ball's speed just before landi

vovangra [49]

5.2m/s

Explanation:

Given parameters:

Mass of baseball = 0.15kg

Momentum of baseball = 0.78kgm/s

Unknown:

Speed of baseball = ?

Solution:

The momentum of the baseball is a function of the product of the mass and velocity. It is a vector quantity:

Momentum = mass x velocity

Since the speed of the ball is unknown:

Velocity = $\frac{momentum }{mass}$

= $\frac{0.78}{0.15}$

= 5.2m/s

The speed of the baseball before it lands is 5.2m/s

Learn more:

Momentum brainly.com/question/9484203

#learnwithBrainly

4 0

3 years ago

Two technicians are discussing fuse testing. Technician A says that a test light should light on both test points of the fuse if

Murljashka [212]

Answer:

C. Both technicians A and B

Explanation:

Both technicians are absolutely correct because a functional test light is meant to light on both test point if the fuse is working fine which implies that, if the test light doesn't light on both sides then there must be a fault with the fuse. So, both technicians A and B are very correct.

4 0

3 years ago

A decrease in the magnitude of velocity is called

ololo11 [35]

That's called an "acceleration" or "slowing down".

5 0

3 years ago

I'm stuck on number 4... help please?

Paha777 [63]

Average speed = (distance covered) / (time to cover the distance) =

 (5m) / (15 sec) =

 (5/15) (m/s) = 1/3 m/s .

Average velocity =

 (displacement) / (time spent traveling) in the direction of the displacement

Average velocity = (5m) / (15 sec) left =

 (5/15) / (m/sec) left =

 1/3 m/s left.

A number without a direction is a speed, not a velocity.

3 0

3 years ago

Read 2 more answers