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nydimaria [60]
2 years ago
14

Jan made a diagram to compare speed and velocity.

Physics
2 answers:
alexandr1967 [171]2 years ago
4 0
It includes magnitude because velocity is a vector quantity. Vector quantities have both direction and magnitude
The answer is B) includes Magnitude
Brainliest answer please
andrezito [222]2 years ago
3 0

The correct answer to the question is it has direction .

EXPLANATION:

Before coming into any conclusion, first we have to understand a vector.

A vector is a  physical quantity which not only requires magnitude but also direction for its complete specification. It is also in accordance with parallelogram law of vector addition.

The speed of a body is a scalar quantity. It has only magnitude . On the other hand, velocity is the speed in a given direction. Hence, it has magnitude as well as direction.

The speed of a body is simply distance travelled per unit time while velocity is the net displacement of a body per unit time. Since, time is relative and dependent on frame of reference, so both speed and velocity depend on frame of reference.

The area marked X lies in velocity region will contain the properties which are not in speed region.

Hence, the area marked X will denote simply that velocity has direction.

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Which changes would result in a decrease in the gravitational force between two objects? Check all that apply.
Rufina [12.5K]

Answer: 1. decreasing the mass of both objects

2. decreasing the mass of one of the objects

3. increasing the distance between the objects

Explanation: Hope that helped! (:

4 0
2 years ago
It's your birthday, and to celebrate you're going to make your first bungee jump. You stand on a bridge 110 m above a raging riv
zzz [600]

Answer:

h=20.66m

Explanation:

First we need the speed when the cord starts stretching:

V_2^2=V_o^2-2*g*\Delta h

V_2^2=-2*10*(-31)

V_2=24.9m/s   This will be our initial speed for a balance of energy.

By conservation of energy:

m*g*h+1/2*K*(h_o-l_o-h)^2-m*g*(h_o-l_o)-1/2*m*V_2^2=0

Where

h is your height at its maximum elongation

h_o is the height of the bridge

l_o is the length of the unstretched bungee cord

800h+21*(79-h)^2-63200-24800.4=0

21h^2-2518h+43060.6=0 Solving for h:

h_1=20.66m  and h_2=99.24m  Since 99m is higher than the initial height of 79m, we discard that value.

So, the final height above water is 20.66m

6 0
2 years ago
Read 2 more answers
A gymnast of mass 70.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume t
DiKsa [7]

Answer:

T = 686.7N

Explanation:

For this exercise we will use Newton's second law in this case there is no acceleration,

      ∑ F = ma

      T -W = 0

The gymnast's weight is

     W = mg

We clear and calculate the tension

     T = mg

     T = 70 9.81

     T = 686.7N

3 0
1 year ago
An underground tunnel has two openings, with one opening a few meters higher than the other. If air moves past the higher openin
klasskru [66]

Answer:

There would be a pressure drop in the direction of the higher opening. This will force air to move in from the lower opening and force it to leave through the higher opening. This will create a convectional movement of air, cooling and ventilating the tunnel.

Explanation:

This is in accordance with bernoulli's law of fluid flow which states that the pressure exerted by a moving fluid is lesser than it would exert if it were at rest.

6 0
2 years ago
50 J of work was performed in 20 seconds. How much power was used to do this task?
yuradex [85]
Power=work/time
power=50/20
50/20=2.5
Therefore A. 2.5 W
7 0
1 year ago
Read 2 more answers
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