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MrRissso [65]
3 years ago
15

A car was moving at 14 m/s After 30 s, its speed increased to 20 m/s. What was the acceleration during this time ( need help fas

t!!!)
Physics
1 answer:
Arada [10]3 years ago
7 0

Answer:let initial velocity u=14m/s

Final velocity v=20m/s

Time taken t=30

Acceleration =a

V=u +at

a= (20-14)/30

a=0.2m/s^2

Explanation:

Acceleration is the change in velocity with respect to time.

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A student pulls out his or her chair in order to sit down. The student pulls the chair 0.75 m with a force of 20 N. How much wor
IRINA_888 [86]
Work = Force x displacement
Force= 20N
Displacement= 0.75m

W= 20(0.75)
W= 15 Nm
3 0
3 years ago
A boy on the edge of a vertical cliff 20-m high throws a stone horizontally outwards with a speed of 20 m/s. It strikes the grou
Komok [63]

Answer:

Horizontal distance from the foot of the cliff is 40 m

Explanation:

Given :

Speed of stone v = 20\frac{m}{s}

Vertical distance d = 20 m

Gravitational acceleration g = 10 \frac{m}{s^{2} }

From the kinematics equation,

  d = v_{o} t + \frac{1}{2} at^{2}

Where v_{o} = initial velocity ( v_{o} = 0 )

So time take to fall down,

  t = \sqrt{\frac{2d}{a} }

  t = \sqrt{4}

  t = 2 sec

Now find horizontal distance travel by stone,

 x = vt

 x = 20 \times 2

 x = 40 m

Therefore, the horizontal distance travel by stone is 40 m

3 0
3 years ago
Personality theorists often focus on ________________.
raketka [301]

Personality theorists often focus on differences in individuals.

Answer: Option A

<u>Explanation: </u>

According to the personality psychology, personality scientists study personality and its variations amongst the individuals. They often focus on the thoughts, judgements and social behaviour of the individuals that they exhibit over time. With these observations, they form a report which better conclude their mental and emotional state.

By studying different types of personalities and respective behaviour, personality theorists are able to predict the diversity in human nature and that whether a person is mentally and emotionally healthy. If not, theorists conduct therapies to get them in order and hence, lead a more meaningful and healthy life.

8 0
3 years ago
How does size influence the appearance of a star? Give an example in your response.
vlabodo [156]
The size of the star defines wither of not it is a dwarf star, or a red giant.
5 0
4 years ago
What term is used for a weather condition characterized by lack of precipitation over a long period of time?
Marrrta [24]

Answer:

Explanation:

<h2><u><em>Drought</em></u></h2>
4 0
3 years ago
Read 2 more answers
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