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Lady bird [3.3K]
3 years ago
15

Which choice is a valid way to construct a motion diagram?

Physics
1 answer:
tigry1 [53]3 years ago
8 0

Answer:

A valid way to construct a motion diagram is to take a series of photographs of a moving object at equal time intervals of time, perpendicular to the direction of motion and overlaying the images to observe the position change with time.

Explanation:

In order to develop a motion diagram, a coordinate system, a zero and appropriate scale should be chosen. Generally positions to the right of the origin are considered positive. Velocity can be determined from the motion diagram by plotting velocity vectors.

The acceleration of an object can also be calculated from the motion diagram.

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A ball is Thrown Upward with An initial velocity of 30 m/s , How high does it rise from the ground when the ball reaches the hig
kobusy [5.1K]

Answer:

  • The maximum height reached by the ball is 45.92 m
  • Time taken to fall down to half of its height is 2.2 s

Explanation:

Given;

initial velocity of the ball, u = 30 m/s

final velocity of the ball at the highest point, v = 0

The maximum height reached by the ball is calculated as;

v² = u² - 2gh

where;

h is the maximum height reached by the ball

0 = 30² - (2 x 9.8)h

19.6h = 900

h = 900 / 19.6

h = 45.92 m

Time taken to fall to half of its height is calculated as;

when falling down, the final velocity v becomes the initial velocity = 0.

Apply the following kinematic equation;

h = ut + ¹/₂gt²

h = 0 + ¹/₂gt²

h = ¹/₂gt²

where;

h = 45.92 m is the maximum height reached

half of h = 45.92 / 2 = 22.96 m

22.96 = ¹/₂gt²

t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 22.96}{9.8} }\\\\t = 2.2 \ s

3 0
3 years ago
A device called an insolation meter is used to measure the intensity of sunlight. It has an area of 100 cm2 and registers 6.50 W
labwork [276]

Answer:

<h2>650W/m²</h2>

Explanation:

Intensity of the sunlight is expressed as I  = Power/cross sectional area. It is measured in W/m²

Given parameters

Power rating = 6.50Watts

Cross sectional area = 100cm²

Before we calculate the intensity, we need to convert the area to m² first.

100cm² = 10cm * 10cm

SInce 100cm = 1m

10cm = (10/100)m

10cm = 0.1m

100cm² = 0.1m * 0.1m = 0.01m²

Area (in m²) = 0.01m²

Required

Intensity of the sunlight I

I = P/A

I = 6.5/0.01

I = 650W/m²

Hence, the intensity of the sunlight in W/m² is 650W/m²

4 0
3 years ago
Which two forces are always equal and opposite for an object on a surface?
Kisachek [45]

Answer:

Suppose any object with mass in our planet.

The object will be affected by the gravitational force, that pulls the object down. Now, a table in your dining room is also affected by this force, but the table is in a surface (the ground) and it does not move.

We know that if an object does not move, then the net force acting on it is equal to zero, this means that there is a force equal and opposite ot the gravitational force.

This force is the normal force, that the ground applies on the table. This force comes as a "response" to the table pushing the ground (By 3rd Newton's law).

So two forces that are always equal and opposite are the forces caused by this law.

5 0
3 years ago
List 3 quantities of waves.
VARVARA [1.3K]
If you mean like electromagnetic waves then, Mico waves, UV rays, and infrared waves
8 0
4 years ago
Read 2 more answers
The smallest particle in the universe? A grain of salt is small, but you can always make it smaller. Imagine cutting that grain
Gekata [30.6K]

Answer:

Quarks

Explanation:

Quarks, the smallest particles in the universe, are far smaller and operate at much higher energy levels than the protons and neutrons in which they are found.

7 0
3 years ago
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