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
just olya [345]
3 years ago
7

A woman exerts a horizontal force of 4 pounds on a box as she pushes it up a ramp that is 10 feet long and inclined at an angle

of 30 degrees above the horizontal.Find the work done on the box.
Physics
1 answer:
stealth61 [152]3 years ago
6 0

Answer:

W = 34.64 ft-lbs

Explanation:

given,

Horizontal force = 4 lb

distance of push, d = 10 ft

angle of ramp, θ = 30°

Work done on the box = ?

We know,

W = F.d cos θ

W = 4 x 10 x cos 30°

W = 40 x 0.8660

W = 34.64 ft-lbs

Hence, work done on the box is equal to W = 34.64 ft-lbs

You might be interested in
Which of these events indicate that a chemical reaction might have occurred?
blagie [28]
Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules. That's it.
7 0
3 years ago
In all atoms of bismuth the number of electrons must equal to
Viefleur [7K]

Answer:

number of protons

Explanation:

3 0
2 years ago
A force of 30 N stretches a very light ideal spring 0.73 m from equilibrium. What is the force constant (spring constant) of the
pantera1 [17]

Answer:

Explanation:

F = k*n

F = 30N

k = ???

N = 0.73 M

F = k* N

30N = k * 0.73

k = 30N / 0.73

k = 41.1

5 0
2 years ago
The pressure of a gas is reduced from 1200.0 mm hg to 850.0 mm hg as the volume of its container is increased by moving a piston
Kamila [148]
From gas laws:
\frac{PV}{T} = Constant

Therefore,
\frac{ P_{1}  V_{1} }{ T_{1} } =  \frac{ P_{2}  V_{2} }{ T_{2} }

P1 = 1200 mm
V1 = 85 ml
T1 = 90°C = 363.15 K
P2 = 850 mm
V2 = 350 ml
T2 = ?

Substituting;
T_{2} =  \frac{ P_{2}  V_{2}  T_{1} }{ P^{1}  V^{1} } =  \frac{850*350*363.15}{1200*85} = 1059.19 K = 786.04 °C
8 0
3 years ago
Read 2 more answers
A hammer is used to hit a nail into a board. Which statement is correct about the forces at play between the nail and the hammer
emmasim [6.3K]

Answer:

Hewo My Lovelys!!

Answer is down below!!

Explanation:

The answer is C) The nail exerts an equal force on the hammer in the opposite direction.

Reason: The Newtons third law states that there is an equal an opposite reaction for every action. When hammer pushes the nail, the nail will push the hammer back in opposite direction. When the hammer hits a nail then nail will exert the equal and opposite force to the hammer. These both objects will exert force on each other in opposite directions.

Hope this helps!! =3

Have a great day, evening, of night!! <3

~ XxGhostMosskitxX

5 0
2 years ago
Read 2 more answers
Other questions:
  • What is mass times acceleration?
    6·1 answer
  • Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past
    14·1 answer
  • A boat is traveling upstream in the positive direction of the x axis at 10 km/h with respect to the water of a river. The water
    8·1 answer
  • How old is a bone that has 12.5% of the original amount radioactive carbon 14 remaining?
    12·1 answer
  • What kind of destructive force or forces will most likely change the way Stone Mountain looks over the next million years? A) vo
    7·2 answers
  • What is a car's acceleration between 25 s and 30 s?
    14·1 answer
  • How to solve 2A− B ?
    14·1 answer
  • A parachute on a racing dragster opens and changes the speed of the car from 93 m/s to 45 m/s in a period of 5.3 seconds. What i
    6·1 answer
  • 20 POINTS! PLZ HELP ME. :-)
    10·1 answer
  • The student hung the plastic strip over a wooden rod
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!