1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Misha Larkins [42]
3 years ago
5

Question 4 (point)

Physics
1 answer:
lord [1]3 years ago
4 0

Answer:

Positive

Explanation:

Tbh I dont have an explanation I just wanted to give the answer but its for sure correct!

You might be interested in
How to change the amount of charge to increase the current​
tensa zangetsu [6.8K]

Answer:

Since formula for current is

I = Q/t

or

Current = Charge / Time

to increase current, the charge must be increased per unit time.

5 0
3 years ago
If you were to yell at a canyon wall, you would hear yourself a short time later. This is because sound can be
mojhsa [17]
The answer is answer b refracted

5 0
3 years ago
Read 2 more answers
Workin
max2010maxim [7]

Answer:

Soru okunmuyor keşke fotoğrafını çekip atsaydın öyle atarsan sorunu çözerim

İYİ DERSLER

8 0
3 years ago
2. The length of a day is based on the amount of time that
Serjik [45]

Answer:

the answer is B: earth takes to rotate once on its axis

6 0
3 years ago
The bigclaw snapping shrimp shown in (Figure 1) is aptly named--it has one big claw that snaps shut with remarkable speed. The p
leva [86]

1) 1.86\cdot 10^6 rad/s^2

2) 2418 rad/s

3) 27000 m/s^2

4) 36.3 m/s

Explanation:

1)

The angular acceleration of an object in rotation is the rate of change of angular velocity.

It can be calculated using the following suvat equation for angular motion:

\theta=\omega_i t +\frac{1}{2}\alpha t^2

where:

\theta is the angular displacement

\omega_i is the initial angular velocity

t is the time

\alpha is the angular acceleration

In this problem we have:

\theta=90^{\circ} = \frac{\pi}{2}rad is the angular displacement

t = 1.3 ms = 0.0013 s is the time elapsed

\omega_i = 0 is the initial angular velocity

Solving for \alpha, we find:

\alpha = \frac{2(\theta-\omega_i t)}{t^2}=\frac{2(\pi/2)-0}{0.0013}=1.86\cdot 10^6 rad/s^2

2)

For an object in accelerated rotational motion, the final angular speed can be found by using another suvat equation:

\omega_f = \omega_i + \alpha t

where

\omega_i is the initial angular velocity

t is the time

\alpha is the angular acceleration

In this problem we have:

t = 1.3 ms = 0.0013 s is the time elapsed

\omega_i = 0 is the initial angular velocity

\alpha = 1.86\cdot 10^6 rad/s is the angular acceleration

Therefore, the final angular speed is:

\omega_f = 0 + (1.86\cdot 10^6)(0.0013)=2418 rad/s

3)

The tangential acceleration is related to the angular acceleration by the following formula:

a_t = \alpha r

where

a_t is the tangential acceleration

\alpha is the angular acceleration

r is the distance of the point from the centre of rotation

Here we want to find the tangential acceleration of the tip of the claw, so:

\alpha = 1.86\cdot 10^6 rad/s is the angular acceleration

r = 1.5 cm = 0.015 m is the distance of the tip of the claw from the axis of rotation

Substituting,

a_t=(1.86\cdot 10^6)(0.015)=27900 m/s^2

4)

Since the tip of the claw is moving by uniformly accelerated motion, we can find its final speed using the suvat equation:

v=u+at

where

u is the initial linear speed

a is the tangential acceleration

t is the time elapsed

Here we have:

a=27900 m/s^2 (tangential acceleration)

u = 0 m/s (it starts from rest)

t = 1.3 ms = 0.0013 s is the time elapsed

Substituting,

v=0+(27900)(0.0013)=36.3 m/s

5 0
3 years ago
Other questions:
  • Unlike images produced by a convex spherical mirror, images produced by concave spherical mirrors
    5·2 answers
  • Amelia is driving her car down a residential street. She approaches a stop sign and applies her brakes. It takes the car a few s
    15·1 answer
  • What does the electron cloud model describe
    13·1 answer
  • What is the velocity of an object that has been in free fall for 0.10 s?
    8·1 answer
  • If asked to describe a wave, you could say waves are the
    6·2 answers
  • The Earth is not a uniform sphere, but has regions of varying density. Consider a simple model of the Earth divided into three r
    15·1 answer
  • An empty container has a mass of 3 g. When it is filled with 5 cm3 of a liquid,
    9·1 answer
  • ADHD is triggered ________ by genetic and neurological factors and ________ by social or environmental ones.
    14·1 answer
  • If a dog has the mass of 14.5kg and accelerates at a rate of 8m/sec2 →, If he runs into you what is the force he hits you with?
    15·1 answer
  • A block of mass 5 kg slides down an inclined plane that has an angle of 10. If the inclined plane has no friction and the block
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!