Physics, 17.08.2020 06:01 harrypottergeek31

A volleyball is released three times from three different heights: 5 m, 10 m, and 20 m. Which statement is correct about the volleyball? The volleyball accelerates more quickly toward the ground when released from a higher height.

The volleyball accelerates the same amount toward the ground each time.

The volleyball accelerates more slowly toward the ground when released from a higher height.

The volleyball may accelerate more quickly or slowly depending on its mass.

A student is setting up an experiment with 10 different balls. The student wants to measure which ball hits the ground with the largest force when released from a box 5 feet above the ground. Which quantity should be measured to correctly calculate the force with which each ball hits the ground?

the initial velocity of each ball
the mass of each ball
the rate at which the velocity of each ball increases
the final velocity of each ball right before hitting the ground

Answers: 2

Show answers

Answers

Answer from: sash0924

The concepts of free fall and Newton's second law allow to find the correct answers

1) Acceleration is constant

2) The mass of the body

The game of volleyball consists of throwing the balls from the serve to pass it to the other court, this is a two-dimensional movement type projectile launch, in this type of movement the acceleration is the constant on the y axis, it is called acceleration of the gravity and vale (g = 9.8 m / s²)

1) Let's review the different statements of the first part regarding acceleration.

a) The ball accelerates faster as it goes down

False. Acceleration is constant

b) The ball accelerates the same amount

True. Acceleration is constant and directed on the vertical axis

c) The ball accelerates slower or faster

False. Acceleration is constant

The vertical launch of kinematics, establishes that the ball as it descends it goes faster with an acceleration equal to the acceleration of gravity, in this part it is asked to look for the force of the ball when it reaches the ground, for this the second is used Newton law

F = m a

where in this case the acceleration is the acceleration of gravity

a = g

F = m g

Let's review the different claims

a) Initial velocity

False. To calculate the force you only need the mass since acceleration is constant

b) The mass

True. The product of the mass and the acceleration of gravity gives the force with which the ball hits the ground

c) Increasing speed

False. Increasing speed allows calculating acceleration not force

d) The final speed

False. Force does not depend on the speed of the body

In conclusion using the concepts of free fall and Newton's second law we can find the correct answers:

1) Acceleration is constant

2) Body mass

Learn more about free fall and Newton's second law here:

link

Answer from: tjmoney8614

Explanation:

The answer is

The volleyball accelerates the same amount toward the ground each time.

Because gravitational acceleration is constant irrespective of altitude(height) or mass of the object.

The answer is

the mass of each ball

because gravitational force is given by

F = mg

since g is a constant, he only needs to measure the mass if each ball

Answer from: Quest

Would like to . could you translate to english

Answer from: Quest

Velocity=total displacement/timefrom house to store is 500 from store to neighbor is 200 therefore total displacement=500+200=700metrestherefore,700metres/910seconds=0.8metres per second

Other questions on the subject: Physics

Physics, 21.06.2019 14:00, Adeenieweenie

Which material produces static charge when rubbed?

Answers: 1

continue

Physics, 22.06.2019 01:30, chloe1107

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

Answers: 1

continue

Physics, 22.06.2019 06:40, alicemareus

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Answers: 1

continue

Physics, 22.06.2019 17:10, lesok0818

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

Answers: 2

continue

You know the right answer?

A volleyball is released three times from three different heights: 5 m, 10 m, and 20 m. Which statem...