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3 years ago

What is the result of two displacement vectors having opposite directions?

Physics

2 answers:

Bingel [31]3 years ago

7 0

Answer:

The resultant is the difference of the two displacements, having the same direction as the larger vector.

Explanation:

Just took the quiz:)

jonny [76]3 years ago

5 0

Answer:

Resultant of two vectors having opposite direction is the difference of the two displacements having the same direction as the larger vector. 

Explanation:

Resultant of two vectors is obtained by performing the vector addition operation. When the directions of both vectors are same the resultant’s direction will also be the same as the inputs. When two vectors have opposite directions, one direction will be taken positive making one vector positive and the other negative.

By performing addition of a positive and negative number we are actually taking the difference between both. Thus performing vector addition of two vectors with opposite directions is equivalent to finding the difference between the vectors. Consider a system consisting of a solid block, on which two forces F1 and F2 act in the opposite direction.

One force will be considered positive and the other is considered negative. The resultant is given by the difference of two force vectors. Displacement of the block will be in the direction of the greater force.

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A car is traveling in a race.The car went from the initial velocity of 35 to the final velocity of 65 in 5 seconds what is the a

Ann [662]

Answer:

Acceleration = 6m/s²

Explanation:

Given the following data;

Initial velocity = 35m/s

Final velocity = 65m/s

Time = 5 seconds

To find the acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Mathematically, acceleration is given by the equation;

$Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}$

Where,

a is acceleration measured in $ms^{-2}$
v and u is final and initial velocity respectively, measured in $ms^{-1}$
t is time measured in seconds.

Substituting into the equation, we have

$a = \frac{65 - 35}{5}$

$a = \frac{30}{5}$

Acceleration = 6m/s²

7 0

3 years ago

Kevin has a mass of 87 kg and is skating with in-line skates. He sees his 22-kg younger brother up ahead standing on the sidewal

neonofarm [45]

Answer:

$V_ k = 3 m/s$

Explanation:

Using the conservation of the linear momentum P:

$P_i = P_f$

so:

$M_kV_k = M_sV_s$

where $M_k$ is the mass of kevin, $V_k$ is the velocity of kevin before he grabs her brother, $M_s$ is the velocity of her brother and him after grabs her brother and $V_s$ is the velocity of both after the collition.

So, replacing the values and solving for Vk, we get:

$(87 kg)V_k = (87 kg+22 kg)(2.4m/s)$

$V_ k = 3 m/s$

8 0

3 years ago

If an object is stationary (not moving), what must the net force be equal to?

Brut [27]

Answer:

Firstly, we can state that the net force is the sum of all forces acting upon the object. Since the object is stationary, by Newton's First Law we can conclude that the sum of all forces acting upon a stationary object is 0 because there are no forces acting upon the object.

Explanation:

Please support my answer.

7 0

3 years ago

Why do women typically tend to have slightly greater stability than men?

Pani-rosa [81]

Women have lower centers of gravity, and lower centers of gravity provide more stability.

The correct option is C.

<h3>What is centre of gravity with example?</h3>

The location in a system or body where the weight is equally distributed and all sides are in balance is known as the center of gravity. The middle of a seesaw is an illustration of a center of gravity. the center of mass of an object in a gravitational field that is uniform.

<h3>How can you improve your center of gravity?</h3>

Training your legs and lower body is essential since they contain the biggest muscles in your body, as any competent bodybuilder or strength athlete will tell you. Exercises like squats, lunges, and calf raises should be a regular part of your workout routine if you want to reduce your center of gravity.

To know more about center of gravity visit:

brainly.com/question/17409320

#SPJ9

3 0

1 year ago

a bullet moving with a velocity of 100m/s pierce a block of wood and moves out with a velocityof 10 m/s.if the thickness of the

erma4kov [3.2K]

The emerging velocity of the bullet is 71 m/s.

The bullet of mass m moving with a velocity u has kinetic energy. When it pierces the block of wood, the block exerts a force of friction on the bullet. As the bullet passes through the block, work is done against the resistive forces exerted on the bullet by the block. This results in the reduction of the bullet's kinetic energy. The bullet has a speed v when it emerges from the block.

If the block exerts a resistive force F on the bullet and the thickness of the block is x then, the work done by the resistive force is given by,

$W=Fx$