All categories

3 years ago

A baseball is hit high and far. Which of the following statements is true? At the highest point,

Physics

1 answer:

erma4kov [3.2K]3 years ago

6 0

Answer:

option C

Explanation:

When the baseball is hit high and far it has some horizontal velocity at the highest point so option an i.e. velocity at the highest point is eliminated.

the baseball act as a projectile at the highest point so, there is always downward acceleration acting on the body. so, option e and d is eliminated.

At the highest point, the vertical velocity is zero and neglecting the air resistance we can say that the velocity of the body is slowest.

Hence, the correct answer is option C

You might be interested in

a 0.15 kg baseball has a momentum of 0.78 kg*m/s just before it lands on the ground. What was the ball's speed just before landi

vovangra [49]

5.2m/s

Explanation:

Given parameters:

Mass of baseball = 0.15kg

Momentum of baseball = 0.78kgm/s

Unknown:

Speed of baseball = ?

Solution:

The momentum of the baseball is a function of the product of the mass and velocity. It is a vector quantity:

Momentum = mass x velocity

Since the speed of the ball is unknown:

Velocity = $\frac{momentum }{mass}$

= $\frac{0.78}{0.15}$

= 5.2m/s

The speed of the baseball before it lands is 5.2m/s

Learn more:

Momentum brainly.com/question/9484203

#learnwithBrainly

4 0

3 years ago

The first hill of a roller coaster is 42 meters high. The top of the second hill of the one

Marta_Voda [28]

Answer:

Part a)

Speed of the roller coaster is

$v = 13.3 m/s$

Part b)

Since it is moving with non zero speed at some height above the ground

So we will have

Kinetic energy + Potential energy Both

Explanation:

As we know that there is no friction on the path

So here we can use mechanical energy conservation law

so we will have

Part a)

$U_i + K_i = U_f + K_f$

$mgh + 0 = \frac{1}{2}mv^2 + mgH$

$34500(9.81)(42) = \frac{1}{2}(34500)v^2 + 34500(9.81)(33)$

$v = 13.3 m/s$

Part b)

Since it is moving with non zero speed at some height above the ground

So we will have

Kinetic energy + Potential energy Both

7 0

4 years ago

Read 2 more answers

Why does a balloon bursts if too much of air is blown into it

solniwko [45]

Answer:

it is due to the elastic rubber and the air pressure builds up and the rubber expands

7 0

3 years ago

A compact car has a maximum acceleration of 2.0 m/s2 when it carries only the driver and has a total mass of 1100 kg . you may w

nadya68 [22]

According to Newton`s law. Force exerted by car,

$F = m a = 1100 kg \times 2 m/s^2 = 2200 \ N$

After adding an additional 400 kg of mass, the force will be same therefore the acceleration

$F = 2200 \ N = (1100 \ kg + 400 \ kg) a \\\\ a = \frac{2200 \ N}{1500 \ kg} = 1.47 \ m/s^2$

Thus, the acceleration after adding the masses is 1.47 \ m/s^2.

4 0

3 years ago

Problem 1: a car is to be hoisted by elevator to the fourth floor of a parking garage, which is 52 ft above the ground. if the e

djyliett [7]

The working equation for this problem is written below:
x = v₀t + 0.5at², where x is the distance traveled, v₀ is the initial velocity, a is the acceleration and t is the time

Let's apply the concept of calculus. The maximum speed is equated to the derivative of x with respect to t.

dx/dt = 8 ft/s = v₀ + at

Since the it starts from rest, v₀ = 0

8 = at
t = 8/a

The net acceleration is 0.7 - 0.35 = 0.35 ft/s². Thus,

t = 8/0.35 = 22.86 seconds

4 0

3 years ago