Physics, 03.07.2019 17:00 24swimdylanoh

The center fielder for the school's baseball team throws a 0.150-kg baseball towards home plate at a speed of 22.0 m/s and an initial angle of 40.0°. what is the kinetic energy of the baseball at the highest point of its trajectory?

Answers: 1

Show answers

Answers

The value of kinetic energy of the baseball thrown by the school's team at the highest point of its trajectory is 21.3 J.

What is kinetic energy?

Kinetic energy is a type of energy, which a body is posses due to its motion. The kinetic energy of a body can be found with the following formula,

$KE=\dfrac{1}{2}mv^2$

Here, (m) is the mass of the body, and (v) is the speed of the body.

The speed of the baseball is 22 m/s. The initial angle of the ball is 40.0 degrees. Thus the horizontal component of the velocity at the highest point can be given as,

$v_h=22\cos(40^o)\\v_h=16.85\rm m/s$

The vertical component of the velocity at the highest point is zero, Thus, we have only a horizontal component of velocity acting on the body at the highest point.

As, the mass of the baseball is 0.150 kg. Thus, put the values in the above formula as,

$KE=\dfrac{1}{2}(0.15)(16.85)^2\\KE=21.3\rm J$

Hence, the value of kinetic energy of the baseball thrown by the school's team at the highest point of its trajectory is 21.3 J.

Learn more about the kinetic energy here;

link

Answer from: Sirwilliam

at the highest point of the trajectory of the ball only horizontal component of the velocity will remain as there is no acceleration in horizontal direction.

But due to gravity in vertical direction the vertical component of the velocity will become zero at the highest point

so here we can say that at highest point we will have

v_x = 22 cos40 = 16.85 m/s

v_y = 0

now for the kinetic energy we can say

$K = \frac{1}{2} mv^2$

here we know that

m = 0.150 kg

v = v_x = 16.85 m/s

now the kinetic energy will be given as

$K = \frac{1}{2}*0.150*16.85^2$

K = 21.3 J

so kinetic energy will be 21.3 J

Answer from: Quest

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm. the wire diameter is d = 0.9 mm. the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2) in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

Answer from: Quest

answer: b.

explanation:

Another question on Physics

Physics, 21.06.2019 22:30

Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball

Answers: 1

Answer

Physics, 22.06.2019 00:30

The plum pudding model of the atom state that ?

Answers: 2

Answer

Physics, 22.06.2019 02:00

Chapter 23, problem 075 the figure shows a geiger counter, a device used to detect ionizing radiation (radiation that causes ionization of atoms). the counter consists of a thin, positively charged central wire surrounded by a concentric, circular, conducting cylindrical shell with an equal negative charge. thus, a strong radial electric field is set up inside the shell. the shell contains a low-pressure inert gas. a particle of radiation entering the device through the shell wall ionizes a few of the gas atoms. the resulting free electrons (e) are drawn to the positive wire. however, the electric field is so intense that, between collisions with gas atoms, the free electrons gain energy sufficient to ionize these atoms also. more free electrons are thereby created, and the process is repeated until the electrons reach the wire. the resulting "avalanche" of electrons is collected by the wire, generating a signal that is used to record the passage of the original particle of radiation. suppose the radius of the central wire is 24 âµm, the inner radius of the shell 2.3 cm, and the length of the shell 14 cm. if the electric field at the shell's inner wall is 2.8 ă— 104 n/c, what is the total positive charge on the central wire?

Answers: 1

Answer

Physics, 22.06.2019 07:10

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

Answers: 1

Answer

You know the right answer?

The center fielder for the school's baseball team throws a 0.150-kg baseball towards home plate at a...

Questions