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3 years ago

What is the average velocity of Runner C for the first 15 seconds? Question 5 options: 1.3 m/s -2.7 m/s -1.3 m/s 2.7 m/s

Physics

2 answers:

kogti [31]3 years ago

7 0

Answer:

2.7 m/s

Explanation:

Took the test and got 100%

kipiarov [429]3 years ago

3 0

Answer:

Average velocity (v) of an object is equal to its final velocity (v) plus initial velocity (u), divided by two.

v¯¯¯=(v+u)2

Where:

v¯¯¯ = average velocity

v = final velocity

u = initial velocity

The average velocity calculator solves for the average velocity using the same method as finding the average of any two numbers. The sum of the initial and final velocity is divided by 2 to find the average. The average velocity calculator uses the formula that shows the average velocity (v) equals the sum of the final velocity (v) and the initial velocity (u), divided by 2.

Explanation:

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The population in the United States in 2015 was 321 million people. It is projected to increase to 438 million people by the yea

NemiM [27]

This can be solve by using the formula

F = p (1+ i)

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438 = 321*( 1 + I )

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4 years ago

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A thin rod of length d on a frictionless surface is pivoted about one end

motikmotik

The magnitude of the angular momentum of the rod immediately after the collision is given as (pf + pi) * d. (Option A).

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Angular Momentum may be defined or described as the vector quantity of the rotation of a body, which is arrived at by multiplying its moment of inertia by its angular velocity.

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3 0

2 years ago

A 35 kg object has -450 kgm/s of momentum. Calculate its velocity.

shtirl [24]

Hi there!

Recall the equation for momentum:

$\large\boxed{p = mv}\\$

p = momentum (kgm/s)

m = mass (kg)

v = velocity (m/s)

We can plug in the given values to solve for velocity:

$-450 = 35v\\\\v = \frac{-450}{35} = \boxed{12.86 m/s}$

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2 years ago

How much potential energy does a 50-N box have when lifted at a height of 1.5M?

nikitadnepr [17]

The correct answer is: Option (A) 75 J

Explanation:

First, be careful with the units here. As you can see it is mentioned that there is a 50N box. It means that the weight (mg) of the box is given as the unit is Newton, not its mass (which is in kg).

As,

Potential-energy = mass * acceleration-due-to-gravity * height

PE = m*g*h --- (A)

In equation (A), mg is actually the weight of the box, which is given.

mg = 50N

h = height = 1.5m

Plug the values in equation (A):

PE = 50 * 1.5 = 75 J (Option A)

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4 years ago

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4 years ago

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