Can velocity of an object be negative when it’s acceleration is positive?

Physics

2 answers:

Bad White [126]3 years ago

6 0

Answer:

Yes

Explanation:

When a bike is coming to a stop the velocity is negative while the acceleration is positive.

Margaret [11]3 years ago

5 0

Answer
Yes
Example
When a car is coming to rest by braking the acceleration will be negative and the velocity will be positive.

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What happens to the pressure in all parts of a confined fluid if the pressure in one part is increased?

Sauron [17]

Answer:

The pressure will be transmitted equally to all other parts of the confined fluid causing a general increase in pressure throughout the container.

Explanation:

This is in line with pascal's law of pressure which states that the pressure exerted on a given mass of fluid is transmitted undiminished to other parts of the fluid.

4 0

3 years ago

A source produces 20 crests and 20 troughs in 4 seconds. The second crest is 3 cm away from the first crest.Calculate :

sineoko [7]

Answer:

Solution given:

No of waves[N] =20crests & 20 troughs

=20waves

Time[T]=4seconds

distance[d]=3cm=0.03m

Now

Wave length=3cm=3 × ${10}^{ - 2}m$

Frequency= $\frac{No of waves}{time}$

= $\frac{20}{4}$ =5Hertz

and

Wave speed:wave length×frequency=3 × ${10}^{ - 2}m$ ×5=1.5 × ${10}^{ - 1} \tt{ {ms}^{ - 1}}$ .

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3 years ago

A metal wire of resistance R is cut into eight equal pieces that are then placed together side by side to form a new cable with

Harrizon [31]

Answer:

R / 64

Explanation:

Let he length of the wire is L and its resistance is R.

The resistance of the wire is directly proportional to the length of the wire. As the wire is cut into 8 equal pieces so the resistance of small wire is R/8.

Now they are connected in parallel.

The equivalent resistance is given by

$\frac{1}{R_{eq}}= 8\times \frac{8}{R}$