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
Murljashka [212]
3 years ago
10

Which statements about velocity are true?

Physics
2 answers:
OleMash [197]3 years ago
5 0
<span>the speed of a direction</span>
iVinArrow [24]3 years ago
3 0

The answer is "It has magnitude and direction."

You might be interested in
A force of 20N acts on a 3.5kg mass for 10s. What is the change in the speed of the object? *Hint find the impulse first*
Elina [12.6K]

Answer:

<h2>I<em> </em><em>d</em><em>on't</em><em> </em><em>know</em><em> </em><em>sorr</em><em>y</em><em> </em><em>bro</em><em> </em><em /><em> </em><em>.</em><em>.</em><em> </em><em> </em><em> </em><em> </em><em>.</em><em>.</em><em>.</em><em>.</em><em> </em><em>pl</em><em>ease</em><em> </em><em>ma</em><em>ke</em><em> </em><em>me</em><em> </em><em>br</em><em>aniest</em><em> </em></h2>
6 0
3 years ago
Several springs are connected as illustrated below in (a). Knowing the individual springs stiffness k1 = 20 N/m, k2 = 30 N/m, k3
Hatshy [7]

Answer:

The equivalent stiffness of the string is 8.93 N/m.

Explanation:

Given that,

Spring stiffness is

k_{1}=20\ N/m

k_{2}=30\ N/m

k_{3}=15\ N/m

k_{4}=20\ N/m

k_{5}=35\ N/m

According to figure,

k_{2} and k_{3} is in series

We need to calculate the equivalent

Using formula for series

\dfrac{1}{k}=\dfrac{1}{k_{2}}+\dfrac{1}{k_{3}}

k=\dfrac{k_{2}k_{3}}{k_{2}+k_{3}}

Put the value into the formula

k=\dfrac{30\times15}{30+15}

k=10\ N/m

k and k_{4} is in parallel

We need to calculate the k'

Using formula for parallel

k'=k+k_{4}

Put the value into the formula

k'=10+20

k'=30\ N/m

k_{1},k' and k_{5} is in series

We need to calculate the equivalent stiffness of the spring

Using formula for series

k_{eq}=\dfrac{1}{k_{1}}+\dfrac{1}{k'}+\dfrac{1}{k_{5}}

Put the value into the formula

k_{eq}=\dfrac{1}{20}+\dfrac{1}{30}+\dfrac{1}{35}

k_{eq}=8.93\ N/m

Hence, The equivalent stiffness of the string is 8.93 N/m.

3 0
3 years ago
What is the car's speed at the bottom of the dip?The passengers in a roller coaster car feel 50% heavier thantheir true weight a
Rashid [163]

Answer:

v = 14 m/s

Explanation:

given,

radius of dip = 40 m

The passengers in a roller coaster car feel 50% heavier than their true weight.

Apparent weight

A = W + \dfrac{W}{2}

A =\dfrac{3W}{2}

A =\dfrac{3mg}{2}

When the car is at the bottom,  the weight will be acting downwards and the centripetal force will also be acting downward where as Normal force which is apparent weight will be acting in upward direction.

now,

N = m g + \dfrac{mv^2}{r}

\dfrac{3mg}{2} = m g + \dfrac{mv^2}{r}

\dfrac{mg}{2} = \dfrac{mv^2}{r}

v = \sqrt{\dfrac{rg}{2}}

v = \sqrt{\dfrac{40\times 9.8}{2}}

v = 14 m/s

8 0
3 years ago
By what percent is the torque of a motor decreased if its permanent magnets lose 6.5 % of their strength
djyliett [7]
6 is the answer I remember the answer from when I took this and it was easy
4 0
2 years ago
Which statements did both Aristotle and Ptolemy assume? Check all that apply.
tensa zangetsu [6.8K]

Bodies in space traveled in circles.

The planets revolved around the Earth.

6 0
3 years ago
Read 2 more answers
Other questions:
  • A 3.50-meter length of wire with a cross-sectional area of 3.14 × 10-6 meter2 is at 20° Celsius. If the wire has a resistance of
    11·1 answer
  • An engine takes in 200 J of heat, expels 40 J of heat, and does 160 J of work. What is the efficiency of the engine?
    5·1 answer
  • How does the movement of particles of matter change when temperature decreases
    12·1 answer
  • If you have 80g of a radioactive substance whose half life is 2 days, how long will it take for the substance to decay to the po
    14·1 answer
  • A force in the +x -direction with magnitude F(x)=18.0N−(0.530N/m)x is applied to a 7.90 kg box that is sitting on the horizontal
    8·1 answer
  • What does a motion diagram represent? ​
    10·1 answer
  • Which waves in the electromagnetic spectrum are considered high energy waves?. . A.radio waves and microwaves. B.X–rays and gam
    13·2 answers
  • A 310-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1,010 A. If the conductor is copper
    11·1 answer
  • Have the rest of my points ( 100 points)<br> SAY SOMETHING NICE DOWN BELOW AND FREE BRAINLEIST
    15·2 answers
  • Advantages of using tidal power include _____. no air pollution tides are predictable low environmental impact all of these
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!