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Tomtit [17]
4 years ago
8

You are walking in the forest with some friends when a wild bear shows up! Naturally, you all begin running faster. Assume that

you had an initial velocity of 0.5 m/s. After running for 20 seconds, you are 50 meters away from where you started. If you accelerated at a constant rate, what must your final velocity be?
Physics
1 answer:
Lera25 [3.4K]4 years ago
6 0

Answer:

Explanation: Here he is running with a uniform acceleration there for you can use motion equation for this

S = (V+U)×t / 2

S = Distance

V = Final velocity

U = Initial Velocity

t = time

50 = (V + 0.5 ) × 20 /2

V = 4.5 m/s

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A pelican hunts fish in the water. As the pelican flies above the water’s surface, why must it aim for the fish in a slightly di
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5 0
3 years ago
The potential energy at x = 8 m is -2000 V and at x = 2 m is 400 V. What is the magnitude and direction of the electric field?
Stells [14]

The potential energy at x = 8 m is -2000 V and at x = 2 m is 400 V. The magnitude and direction of the electric field will be 400 V/m directed parallel to the +x-axis

Electric field, an electric property associated with each point in space when charge is present in any form. The magnitude and direction of the electric field are expressed by the value of E, called electric field strength or electric field intensity or simply the electric field.

The electric potential energy of any given charge or system of changes is termed as the total work done by an external agent in bringing the charge or the system of charges from infinity to the present configuration without undergoing any acceleration.

The relation between electric field and electric potential can be generally expressed as – “Electric field is the negative space derivative of electric potential.”

Electric field = - d V / dx

-(-2000-400) = \int\ {E} \, dx

2400 = E (8-2)

2400 V = E (6)

E = 400 V/m

To learn more about electric potential energy  here

brainly.com/question/16890427

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3 0
2 years ago
Please answer this question first one to answer the right answer will be marked brainiest
Nataly_w [17]

Answer:  Force per unit area. Explanation: P = 25/20. P = 5/4 Pascal or 1.25 Pascal

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8 0
3 years ago
During a baseball game, a batter hits a popup to a fielder 83 m away. The acceleration of gravity is 9.8 m/s 2 . If the ball rem
topjm [15]

Answer:

41.2 m.

Explanation:

It takes half the time that is (5.8/2) = 2.9 seconds, for the ball to reach its apex.

Given:

S = 83 m

t = 5.8 s

vf = 0 m/s

a = - g

= - 9.81 m/s^2

Equations of motion:

i. vf = vi + a * t

ii. h = vi * t + 1/2 (a * t²)

Using the i. equation of motion:

0 m/s = vi - (9.8 m/s²) (2.9 sec)

vi = 28.4 m/s.

Using the ii. equation of motion:

h = (28.4 * 2.9 ) - 1/2 (9.8 * (2.9)²)

= 82.4 - 41.2

= 41.2 m.

3 0
4 years ago
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