All categories

3 years ago

The y-intercept of a position-time graph of an object gives the average velocity of the object.

Physics

1 answer:

finlep [7]3 years ago

4 0

The y-intercept of a position-time graph of an object gives the average velocity of the object is False.

Answer: False. 

Explanation:

The initial position of the object can be obtained by calculating the Y intercept of a position-time graph. In a position-time graph, the independent variable is time and dependent variable is position. Y axis is the position axis and x axis is the time axis.

The equation of the graph is given by $y =mx + c$ . m is the slope of the graph and c is the y intercept. When a particle starts from the origin its y intercept is zero.

The nature of the graph gives us an idea about velocity. When the velocity is positive, the position- time graph has positive slope and when the velocity is positive the graph has negative slope.

You might be interested in

M/s

SashulF [63]

Answer:

a. Final velocity, V = 2.179 m/s.

b. Final velocity, V = 7.071 m/s.

Explanation:

Given the following data;

Acceleration = 0.500m/s²

a. To find the velocity of the boat after it has traveled 4.75 m

Since it started from rest, initial velocity is equal to 0m/s.

Now, we would use the third equation of motion to find the final velocity.

$V^{2} = U^{2} + 2aS$

Where;

V represents the final velocity measured in meter per seconds.
U represents the initial velocity measured in meter per seconds.
a represents acceleration measured in meters per seconds square.
S represents the displacement measured in meters.

Substituting into the equation, we have;

$V^{2} = 0^{2} + 2*0.500*4.75$

$V^{2} = 4.75$

Taking the square root, we have;

$V^{2} = \sqrt {4.75}$

Final velocity, V = 2.179 m/s.

b. To find the velocity if the boat has traveled 50 m.

$V^{2} = 0^{2} + 2*0.500*50$

$V^{2} = 50$

Taking the square root, we have;

$V^{2} = \sqrt {50}$

Final velocity, V = 7.071 m/s.

8 0

3 years ago

A horse travels 80 meters south in 20 seconds. What is its average velocity?

AURORKA [14]

Average velocity is a vector unit (i.e. includes magnitude and direction) calculated by working out distance ÷ time:

80 metres ÷ 20 seconds = 4 metres/seconds (m/s)

Therefore, your final answer is C. 4 m/s south.

7 0

2 years ago

A person suffering from anaemia gets tired after a short walk

FrozenT [24]

Answer:

yes

Explanation:

you will feel weary after shorter times

5 0

3 years ago

Read 2 more answers

Calculate earth's mass given the acceleration due to gravity at the north pole is 9.830 m/s2 and the mean radius of the earth at

valentinak56 [21]

Answer: $M = 5.98\times 10^{24} kg$

Explanation:

We know that force acting on an object due to Earth's gravity on the surface is given by:

$mg = G\frac{Mm}{r^2}\\ \Rightarrow g = \frac{GM}{r^2}$

where g is the acceleration due to gravity, r would be radius of Earth, M is the mass of Earth and G is the gravitational constant.

It is given that at pole, g = 9.830 m/s² and r = 6371 km = 6371 × 10³ m

$\Rightarrow M = \frac{g\times r^2}{G}$

$M = \frac{9.830 m/s^2 \times (6371 \times 10^3 m )^2}{6.67 \times 10^{-11} m^3 kg^{-1} s^{-2}}$

$\Rightarrow M = 5.98\times 10^{24} kg$

Hence, Earth's mass is $5.98\times 10^{24} kg$

5 0

3 years ago

A can of soup is begin heated in a sauce pan. as the soup is heated, the warm fluid becomes less dense and rises, while the cool

Alexxandr [17]

It is c convection because convection is when something is hot therefore less dense material to rise and cooler material to sink under the influence of gravity

8 0

2 years ago