Answer:
2.286 km/s²
Explanation:
Since acceleration a = (v - u)/t where u = initial horizontal velocity of ball = 0 m/s (since it starts from rest), v = final horizontal velocity of ball at serve = 73.14 m/s and t = time taken for serve = 32.0 ms = 0.032 s
Substituting the values of the variables into the equation, we have
a = (v - u)/t
a = (73.14 m/s - 0 m/s)/0.032 s
a = 73.14 m/s/0.032 s
a = 2285.625 m/s²
a = 2.285625 km/s²
a ≅ 2.286 km/s²
So, the x - component of the ball's acceleration during the serve is 2.286 km/s²
After rubbing the head, ballon get all the electrones and negatively charged and hair get positively charged, then their is electro static force between hair and ballon
Answer:
The truck must travel by 95.16 km/h to stay beneath the airplane
Explanation:
Lets explain how to solve the problem
How fast must a truck travel to stay beneath an airplane that is moving
105 km/h at an angle of 25° to the ground
The truck moves a long the horizontal ground
The airplane moves 105 km/h at an angle 25° to the ground
The truck must moves with velocity equal the horizontal component
of the velocity of the airplane to stay beneath the airplane
The angle between the line represented the velocity of the airplane
and the ground is 25°
→ The horizontal component of the velocity = v cos(25)
→ The velocity of the airplane is 105 km/h
→ The horizontal component = 105 cos(25) = 95.16 km/h
The velocity of the truck = the horizontal component of the airplane
<em>The truck must travel by 95.16 km/h to stay beneath the airplane</em>
Answer: According to Coulomb, the electric force for charges at rest has the following properties: Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge. The attraction or repulsion acts along the line between the two charges.
Brainliest pweasee if I could help you out!
<h2> ૮₍˶ •. • ⑅₎ა ♡</h2>
<span>A+B-C
</span><span>A = 6x - 2y
B = -4x - 8y
C = -3x + 9y
(</span>6x - 2y) + (-4x - 8y) - (-3x + 9y)
(6x - 2y) + (-4x - 8y) + (3x - 9y)
2x -10y + (3x - 9y)
5x - 19y