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weqwewe [10]
2 years ago
14

In which situation is the acceleration of the car negative?

Physics
2 answers:
Schach [20]2 years ago
6 0
B) The velocity of a car reduced from 50 km/h to 35 km/h over one minute
olga_2 [115]2 years ago
5 0
The most appropriate answer is B !!

as the velocity of car is decreased in one min, from 50 to 35 , so there must be deacceleration !! or say negative acceleration !!

so your answer is B !!
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Water is drawn from a well in a bucket tied to the end of a rope whose other end wraps around a solid cylinder of mass 50 kg and
sleet_krkn [62]

Answer:

\alpha=78.4\ rad.s^{-2}

Explanation:

Given:

  • mass of solid cylinder, m=50\ kg
  • diameter of cylinder, d=0.25\ m
  • mass of bucket of water, m_w=20\ kg

<em>When the bucket is released to fall in the well, it fall under the acceleration due to gravity.</em>

We have formula for angular acceleration as:

\alpha=\frac{g}{r}

where:

g = acceleration due to gravity

r = radius of the cylinder

\aplha=\frac{9.8}{0.125}

\alpha=78.4\ rad.s^{-2}

4 0
3 years ago
Distinguish between linear momentum and angular momentum.
Katarina [22]

Linear momentum is in a straight line and depends on the objects mass and velocity.

Angular (rotational) momentum depends on the objects mass, velocity, and radius.

7 0
3 years ago
What is one characteristic that is similar between reflection and refraction? They both describe how light rays -
Feliz [49]
The answer is A im pretty sure
3 0
3 years ago
Read 2 more answers
Two particles are moving with positions given by x= 4t^2−2t and x= 6t^3+8t respectively.
Evgen [1.6K]

Explanation:

<em>a)Which of the two has uniform acceleration?</em>

Acceleration is the second derivative of position.  The acceleration of the first particle is:

x = 4t² − 2t

v = 8t − 2

a = 8

The acceleration of the second particle is:

x = 6t³ + 8t

v = 18t² + 8

a = 36t

The first particle has uniform acceleration.

<em>b)Which one is likely to come to rest at some time during its motion?</em>

The particles come to rest when v = 0.  The first particle's velocity has a real zero at t = 4.  The second particle's velocity has only imaginary zeros, meaning v is never 0.

6 0
3 years ago
Please help....
neonofarm [45]

Answer:

its a compass rose or a temperature that tells how is it hot or cold or it is to u where to go when needed like a map.And the angles is 6

Explanation:

8 0
3 years ago
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