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3 years ago

To calculate the _____ of a moving object, divide the displacement by the time interval in which the displacement occurred.

Physics

2 answers:

marusya05 [52]3 years ago

5 0

Answer: Speed

Explanation: Scalar quantity is the quantity that only possess magnitude but no direction.

Vector quantity is the quantity that only possess magnitude as well as direction.

Speed is defined as the displacement of an object per unit time and is a scalar quantity as it does not involve any direction.

Velocity is defined as the distance moved by an object per unit time and is a vector quantity as it deals with magnitude as well as direction.

4vir4ik [10]3 years ago

3 0

Hello!

To calculate the speed(velocity) of a moving object, we can divide the displacement by the time interval in which the displacement occurred.

This is based off the formula:
v=d/t

Where v=velocity, d=total displacement, t=Time interval

Hope this helps. Any question please just ask. Thank you kindly.

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How Is radar used to determine the speed of a car

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Radars are frequently used to identify distance and speed, such as how far away an object is or how fast it is moving. The radar device can then use the change in frequency to determine the speed at which the car is moving. In laser-speed guns, waves of light are used in place of radio waves.

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3 years ago

A car is running at the speed of 45km/hr see a child 25 meter ahead and suddenly apllies a brakes. If the retradation of the car

kenny6666 [7]

Answer:

The car stops in 7.78s and does not spare the child.

Explanation:

In order to know if the car stops before the distance to the child, you take into account the following equation:

$x=x_o+v_ot-\frac{1}{2}at^2$ (1)

vo: initial speed of the car = 45km/h

a: deceleration of the car = 2 m/s^2

t: time

xo: initial distance to the child = 25m

x: final distance to the child = 0m

It is necessary that the solution of the equation (1) for time t are real.

You first convert the initial speed to m/s, then replace the values of the parameters and solve the quadratic polynomial for t:

$45\frac{km}{h}*\frac{1h}{3600s}*\frac{1000m}{1km}=12.5\frac{m}{s}$

$0=25+12.5t-2t^2\\\\2t^2-12.5t-25=0\\\\t_{1,2}=\frac{-(-12.5)\pm \sqrt{(-12.5)^2-4(2)(-25)}}{2(2)}\\\\t_{1,2}=\frac{12.25\pm 18.87}{4}\\\\t_1=7.78s\\\\t_2=-1.65s$

You take the first value t1 because it has physical meaning.

The solution for t is real, then, the car stops in 7.78s and does not spare the child.

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3 years ago

Which is the largest animal

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Answer:

The Antarctic blue whale 

Explanation:

The Antartic blue whale is the largest animal on the planet its weight is 400,000 pounds which is approxomately the weight of 33 elephnats and it can reach till 98 feet in length.

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2 years ago

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When a man walks across the carpet and reaches for the door knob, why does he get shocked? doorknob Question 3 options: There is

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The imbalance of electric charges within or on the surface of a material or between materials is known as static electricity. When you grab a doorknob, electrons jump from your hand to the knob .which conducts electricity, giving you a shock.

<h3>What is static electricity?</h3>

The imbalance of electric charges within or on the surface of a material or between materials is known as static electricity.

The charge will persist until it can be moved away by an electric current or an electrical discharge.

when we walk on the carpet with socks our feet slide electrons off the carpet. it leads to leaving you with a slightly negative static charge.

When you grab a doorknob electrons jump from your hand to the knob which conducts electricity giving you a shock.

Due to the static electricity jump from your hand to the knob .which conducts electricity giving you a shock.

To know more about static electricity refer to the link ;

brainly.com/question/821085

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2 years ago

Speed is the rate of change in

vaieri [72.5K]

Speed is the rate of change of distance.

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