1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lunna [17]
3 years ago
5

A 1kg box is pushed on a flat surface that is 250m long. The box is initially at rest and then pushed with a constant Net force

of 5N along the entire length. What is the velocity of the box when it reaches the end of the surface.
A. 25m/s

B. 2500m/s

C. 50m/s

D. 75m/s
Physics
1 answer:
sasho [114]3 years ago
7 0

Answer:

C) 50 m/s

Explanation:

With the given information we can calculate the acceleration using the force and mass of the box.

Newton's 2nd Law: F = ma

  • 5 N = 1 kg * a
  • a = 5 m/s²

List out known variables:

  • v₀ = 0 m/s
  • a = 5 m/s²
  • v = ?
  • Δx = 250 m

Looking at the constant acceleration kinematic equations, we see that this one contains all four variables:

  • v² = v₀² + 2aΔx

Substitute known values into the equation and solve for v.

  • v² = (0)² + 2(5)(250)
  • v² = 2500
  • v = 50 m/s

The final velocity of the box is C) 50 m/s.

You might be interested in
Please help, I need help with this test question
Arturiano [62]

I believe this is right-

for the first question, it should be fluffy

and for the second it should be spot

potential energy is unused

kinetic energy is being used

4 0
2 years ago
Why do waves with frequencies higher than visible light hurt while those with lower frequencies do not affect us?
STALIN [3.7K]
Lower frequency waves have less strength to penetrate. How bad a wave is all depends on how well it penetrates our bodies. Visible light doesn't penetrate ur skin, but UV rays (higher than visible) can go through our skin, making it <span>bad" for us. High frequency waves have more energy and move faster</span>
7 0
3 years ago
Read 2 more answers
A brick of mass 1.15 kg is attached to a thin (massless) cable and whirled around in a circle in a vertical plane. The circle ha
stira [4]

Explanation:

It is given that,

Mass of the brick, m = 1.15 kg

Radius of the circle, r = 1.44 m

The cable will break if the tension exceeds 43.0 N

Let v is the maximum sped can have at the bottom of the circle before the cable will break. At the bottom of the circle, the net force is equal to the centripetal force along with the weight of the brick. So,

T=\dfrac{mv^2}{r}+mg

\dfrac{T}{m}-g=\dfrac{v^2}{r}

v=\sqrt{(\dfrac{T}{m}-g)r}

v=\sqrt{(\dfrac{43}{1.15}-9.8)\times 1.44}

v = 6.30 m/s

So, the maximum speed of the brick at the bottom of the circle before the cable will break is 6.3 m/s. Hence, this is the required solution.

8 0
3 years ago
A capacitor with plates separated by a distance d is charged to a potential difference ΔVC. All wires and batteries are disconne
Tom [10]

Answer:

Explanation:

Initial separation of plate = d

final separation = 2d

The capacitance of the capacitor will reduce from C to C/2 because

capacitance = ε A / d

d is distance between plates.

As the batteries are disconnected , charge on the capacitor becomes fixed .

Initial charge on the capacitor

= Capacitance x potential difference

Q = C ΔV

Final charge will remain unchanged

Final charge = C ΔV

Final capacitance = C/2

Final potential difference = charge / capacitance

= C ΔV /  C/2

= 2 ΔV

Potential difference is doubled after the pates are further separated.

6 0
3 years ago
Type of energy transformed into chemical energy by plants is called type of energy transformed into chemical energy by plants is
yuradex [85]
I think the correct answer is light energy. It is light energy that is transformed into chemical energy by plants by the process called photosynthesis. In this process, plants<span> take in water, carbon dioxide, and sunlight and </span>turn<span> them </span>into<span> glucose and oxygen.</span>
6 0
3 years ago
Other questions:
  • Two wires have the same resistance and radius. If the wires are made of copper and platinum with resistivities respectively of 1
    15·1 answer
  • Determine the time needed for the load at b to attain a speed of 10 m/s, starting from rest.
    13·1 answer
  • A skydiver has a mass of 110 kg. At what speed will she have a momentum
    13·2 answers
  • A)topirea ghetii este un fenomen...
    10·1 answer
  • A tugboat is pulling a barge into a harbor. The barge is exerting a force of 3000 N against the tugboat.
    6·2 answers
  • How has technology changed farming?
    6·1 answer
  • MARKING BRAINLIEST!!! NOOOOOOOOOOOO LINKS OR I WILLLLLLLLL REPORT YOU!
    7·2 answers
  • A plane starting at rest at one end of a runway undergoes a uniform acceleration of 4.8 m/s
    15·1 answer
  • 3. What Can occur between the sun and Mars.
    15·2 answers
  • How many years does it take for pluto to orbit the sun.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!