All categories

3 years ago

A ball which is thrown upward

Physics

2 answers:

vodka [1.7K]3 years ago

8 0

Answer:

44.27 m/s

Explanation:

Let's set the upwards direction to be positive and the downwards direction to be negative.

Since we do not know the final velocity of the ball right before it hits the ground, we will use our knowledge that the final velocity of the ball is 0 m/s right before it changes direction to fall back to the ground.

a = -9.8 m/s²
Δy = 100 ft
v = 0 m/s
v₀ = ?

Find what constant acceleration equation contains all four variables.

v² = v₀² + 2aΔy

Substitute the known variables into the equation and solve for v₀, the initial velocity.

(0)² = v₀² + 2(-9.8)(100)
0 = v₀² - 1960
1960 = v₀²
v₀ = 14√10 = 44.27188724

The initial velocity of the ball 44.27 m/s.

Alex777 [14]3 years ago

4 0

Answer:

44.27 m/s

Explanation:

Let's set the upwards direction to be positive and the downwards direction to be negative.

a = -9.8 m/s²

Δy = 100 ft

v = 0 m/s

v₀ = ?

Find what constant acceleration equation contains all four variables.

v² = v₀² + 2aΔy

Substitute the known variables into the equation and solve for v₀, the initial velocity.

(0)² = v₀² + 2(-9.8)(100)

0 = v₀² - 1960

1960 = v₀²

v₀ = 14√10 = 44.27188724

The initial velocity of the ball 44.27 m/s.

You might be interested in

A student finds an unlabeled liquid container in his lab. He notices that the container has two liquids. Since the two liquids h

raketka [301]

Answer:

$\rho = 1848.03 kg m^{-3}$

Explanation:

given data:

density of water \rho = 1 gm/cm^3 = 1000 kg/m^3

height of water = 20 cm =0.2 m

Pressure p = 1.01300*10^5 Pa

pressure at bottom

$P = P_{fluid} + P_{h_2 o}$

$P = P_{fluid} + \rho g h$

$P_{fluid} = P - \rho g h$

= 1.01300*10^5 - 1000*0.2*9.8

= 99340 Pa

$p_{fluid} = P_{atm} + \rho g h_{fluid}$ h_[fluid} = 0.307m

$99340 = 104900 + \rho *9.8*0.307$

$\rho = 1848.03 kg m^{-3}$

5 0

4 years ago

What mindset do you believe Einstein had while alive and what do you think the key component or constant action was for Einstein

grandymaker [24]

Albert Einstein had a growth mindset due to innovative nature.

<h3>What mindset do you believe Einstein had?</h3>

Albert Einstein had a growth mindset because he did not give up when he face failure. He was very good in math and science but did not get into the school. The reason behind is that Einstein is different from other students. The key component or constant action was focus and devotion to work for Einstein throughout his "miracle year".

So we can conclude that Albert Einstein had a growth mindset due to innovative nature.

Learn more about miracle here: brainly.com/question/14170386

#SPJ1

4 0

2 years ago

A 40 kg skateboarder runs at a constant velocity of 12 m/s and jumps off a stationary skateboard with a mass of 8 kg. What is th

horsena [70]

Answer:

60 m/s (in the opposite direction)

Explanation:

By conservation of momentum,

Initial momentum of board + Initial momentum of man = Final momentum of board + Final momentum of man

=> 0 + 40*12 = 8*(-v) + 0

=> v = -60 [ Negative indicates opposite direction ]

7 0

4 years ago

Suppose you push a toy train with a force of 3 N east. The train has a mass of 0.5 kg. What is its acceleration?

Sergeu [11.5K]

The answer u are looking for is not a b or d it is c <span />

8 0

4 years ago

The elements in a column of the periodic table _____.

Shtirlitz [24]

C. have similar properties
(this is because they have the same number of electrons in the outer orbital)

7 0

3 years ago