22.09.2020

# Baseballs pitched by a machine have a horizontal velocity of 30 meters/second. the machine accelerates the baseball from 0 meters/second to 30 meters/second in 0.5 seconds. if a baseball has a mass of 0.15 kilograms, the force the machine exerts is newtons. use f = ma, where a= v-u/t. 22

17.02.2022, solved by verified expert
138 students found this answer helpful

using the formula

F = ma

Where F is the force applied by the machine

A is the acceleration which is also equal to v/t where v is the velocity and t is time

M is the mass

F = mv/t

F = (0.15kg) (30 – 0 m/s)/ 0.5 s

F = 9 N

## Video explanation

### Faq

Biology

This can be solve using the second law of Newtons, where the equation is :

F = ma

Where a = v /t

F = m (v / t)

Where F is the force applied

M is the mass

V is the velocity

T is the time

F = (0.15 kg) ( 30 m/s / 0.5 s)

F = 9 N

Biology

This can be solve using the second law of Newtons, where the equation is :

F = ma

Where a = v /t

F = m (v / t)

Where F is the force applied

M is the mass

V is the velocity

T is the time

F = (0.15 kg) ( 30 m/s / 0.5 s)

F = 9 N

Physics

F = 9 N

Explanation:

As we know that the acceleration of ball is given as rate of change in velocity of the object

so here we will have here we know that   now we will have now in order to find the force we will use Newton's II law which is given as now by above formula we have Physics
The acceleration of the baseball is: where and are the final and initial speed of the ball, and is the time interval in which the force acted.

Replacing the numbers, we get And at this point, we can use Newton's second law F=ma to find the value of the force of the pitching machine: Physics
Options:
a. a lower frequency and a shorter wavelength.
b. a higher frequency and a longer wavelength.
c. a lower frequency and a longer wavelength.
d. a higher frequency and a shorter wavelength

d. a higher frequency and a shorter wavelength

Explanation:
The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength. Light waves have very, very short wavelengths.
For example, Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. Physics
Options:
a. 0.08 meters
b. 0.16 meters
c. 0.32 meters
d. 1.8 meters

b. 0.16 meters

Explanation:
In the picture Physics
Answer: Option B and C are True.

Explanation:
The weight of the two blocks acts downwards.
Let the weight of the two blocks be W. Solving for T₁ and T₂:
w = T₁/cos 60° -----(1);
w = T₂/cos 30° ----(2);
equating (1) and (2)
T₁/cos 60° = T₂/cos 30°;
T₁ cos 30° = T₂ cos 60°;
T₂/T₁ = cos 30°/cos 60°;
T₂/T₁ =1.73.
Therefore, option a is false since T₂ > T₁.
Option B is true since T₁ cos 30° = T₂ cos 60°.
Option C is true because the T₃ is due to the weight of the two blocks while T₄ is only due to one block.
Option D is wrong because T₁ + T₂ > T₃ by simple summation of the two forces, except by vector addition. Physics

Independent variable: the best method to get rid of them.

Dependent variable: washing with soap and water.

Hypothesis: Organic oils

Control group: water

Physics

Option D

Step-by-step explanation:

D.
Heat each cube to the same temperature, place each cube into different containers with 500 grams of water at the same temperature, and measure the temperature of the water.

Physics

9.6 meters

Step-by-step explanation:

Time taken by the tomatoes to each the ground

using h = 1/2 g t^2

t^2 = 2h/g = 2 x 50/ 9.8 = 10.2

t = 3.2 sec

horizontal ditance = speed x time = 3 x 3.2 = 9.6 meters

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