All categories

3 years ago

Pls help with these two last questions

Physics

1 answer:

zhenek [66]3 years ago

5 0

Answer:

F = 50[N], to the left.

v = 10.52 [m/s]

Explanation:

First problem

In order to solve this problem we must apply Newton's laws, in such a way that we must perform a summation of forces on the horizontal axis. In this way we will analyze each force and the direction of action.

The offensive player is applying a force of 100N to the right, while the defensive player applies a force of 150N to the left. In this way performing the summation of forces we have.

100 - 150 = F

F = - 50 [N]

Note: The negative sign indicates that the resulting force is to the left.

Second problem

We must remember that the definition of speed is equal to the relationship between distance over time.

x = distance = 100 [m]

t = time = 9.5 [s]

v = x/t

v = 100/9.5

v = 10.52 [m/s]

You might be interested in

Hat do the ancient civilizations of China, Egypt, and Greece have in common with regard to sports?

MAXImum [283]

The similarity among ancient civilizations of China, Egypt, and Greece with regard to sports is that they all organized athletic games that recurred annually.

I hope this helps! :)
~ erudite

5 0

2 years ago

What is the acceleration at 3 seconds? Please explain your answer. Thank you :]

statuscvo [17]

Answer:

$-3 m/s^{2}$

Explanation:

Acceleration on a VT graph is the slope of the line at the given point. We can find the slope at 3 with Δy/Δx. This gives us (4-2)/(3-(-3)) which works out to be -3m/s^2

8 0

2 years ago

Explain the process that causes dew to form on blades of grass.

AysviL [449]

Answer:

Condensation causes dew to form on blades of grass. This is because the water molecules react to the grass when it is heated, and the surroundings became cool. The molecules would bring to calm and turn to liquid.

Explanation:

I just took the test

8 0

3 years ago

Read 2 more answers

A 50 kilogram woman wearing a seatbelt is traveling in a car that is moving with a velocity of +10 meters per second. In an emer

ra1l [238]

Answer:

the answer is A.) -1 * 10^3[N]

Explanation:

The solution consists of two steps, the first step is using the following kinematic equation:

$v=v_{i} +a*t\\where:\\v=final velocity [m/s]\\v_{i}=initial velocity [m/s]\\a=acceleration[m/^2]\\t=time[s]\\$

The initial velocity is 10 [m/s], and the final velocity is zero because the car stops in 0.5[s].

Replacing:

$0=10+a*(0.5)\\a=-20[m/s^2]$

Now in the second part, we need to use the second law of Newton, this law relates the forces with the acceleration of a body.

In the moment when the car stops suddenly the driver will feel the force of the seatbelt acting in the opposite direction of the movement.

$F=m*a\\F=50[kg]*(-20[m/s^2])\\units\[kg]*[m/s^2]=[N]\\F=-1000[N] or -1*10^{3} [N]$

The minus sign means that the force is acting in the opposite direction of the movement.

7 0

3 years ago

If some raps 3words per second then how many words would he say in 9,999,999,990 seconds

wolverine [178]

Answer:

29,999,999,970 words

Explanation:

9,999,999,990x3

3 0

3 years ago

Read 2 more answers