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Ray Of Light [21]

3 years ago

12

How does frame of reference affect how motion is described?

1 answer:

Zielflug [23.3K]3 years ago

8 0

Frame of reference TOTALLY affects how motion is described.

ALL measurements of motion are ALWAYS described relative to
some frame of reference.

And so is kinetic energy and so is gravitational potential energy.

Changing the frame of reference changes ALL of these.

And there's no such thing as the "REAL" motion or the "REAL"
mechanical energy. It totally depends on the frame of reference
in which it's measured.

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If a pitcher throws a baseball 10 m in 30 seconds - what would be the average speed of the baseball

dangina [55]

S = d/t
S = 10m/30s
S = 0.33m/s

6 0

3 years ago

A 0.145 kg baseball is thrown with a velocity of 25.0 m/s. How much work was done on the baseball to bring it from rest to 25.0

sergey [27]

Answer:

45.31 J

Explanation:

We are given that

Mass of baseball , m=0.145 kg

Initial velocity, u=0

Final velocity, v=25 m/s

We have to find the work done on the baseball to bring it from rest to 25 m/s

We know that

Work done = Change in kinetic energy

Work done, W= $\frac{1}{2}m(v^2-u^2)$

Using the formula

Work done, W $=\frac{1}{2}(0.145)((25)^2-0)$

Work done= $\frac{1}{2}(0.145)(625)$

Work done, W=45.31 J

Hence, the work done on the baseball to bring it from rest to 25 m/s

=45.31 J

3 0

3 years ago

A cat sees its his favorite human come in the door and runs toward him. the cat starts with a velocity of 4.94 m/s and slows to

exis [7]

Answer:

Average acceleration =-2.53m/s^2

Displacement s = 4.2m

Explanation:

4 0

3 years ago

Caculate the component of a force of 200 ns <br>at a direction of 60° to the force

Lady bird [3.3K]

Answer:

$F_x = 100N$

$F_y = 100\sqrt 3 \ N$

Explanation:

Given

$F = 200N$

$\theta = 60^o$

Required

The component of the force in F direction

To do this, we simply calculate the force in the vertical and horizontal direction.

This is calculated as:

$F_x = F * \cos(\theta)$ --- Horizontal

$F_y = F * \cos(\theta)$ ---- Vertical

So, we have:

$F_x = F * \cos(\theta)$ --- Horizontal

$F_x = 200N * \cos(60^o)$

$F_x = 200N * 0.5$

$F_x = 100N$

$F_y = F * \cos(\theta)$ ---- Vertical

$F_y = 200N * \sin(60^o)$

$F_y = 200N * \frac{\sqrt 3}{2}$

$F_y = 100\sqrt 3 \ N$

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3 years ago

What are fossil fuels

kherson [118]

A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.

5 0

3 years ago

Read 2 more answers