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
Troyanec [42]
2 years ago
12

When a 40N force, parallel to and directed up the incline, is applied to a block on a frictionless incline that is 30o above the

horizontal, the acceleration of the block is 2.0 m/s2, up the incline. Find the mass of the block.

Physics
2 answers:
Vlad1618 [11]2 years ago
4 0

Answer:

5.8 kg

Explanation:

We are given that

Force,F=40 N

\theta=30^{\circ}

Acceleration,a=2 m/s^2

We have to find the mass of block.

F_{net}=ma

F-mgsin\theta=ma

F=mgsin\theta+ma=m(gsin\theta+a)

40=m(9.8sin30+2)

Where

g=9.8m/s^2

40=6.9m

m=\frac{40}{6.9}=5.8 kg

Karolina [17]2 years ago
4 0

Answer:

m=5.797\ kg

Explanation:

GIVEN:

applied force up the inclined plane, F=40\ N

angle of the plank from the horizontal, \theta=30^{\circ}

acceleration of the body up the plane, a=2\ m.s^{-2}

Now from the  schematic we balance the forces:

F-mg\sin\theta=m.a

F=m(g\sin\theta +a)

40=m(9.8\times0.5+2)

m=5.797\ kg

You might be interested in
WILL MARK BRAINLIST
ryzh [129]

Answer:

Definition of envelop

transitive verb

1: to enclose or enfold completely with or as if with a covering

2: to mount an attack on (an enemy's flank)

3 0
1 year ago
What type of material is good at transferring heat?
MatroZZZ [7]
The answer is A

Materials that are good conductors of thermal energy are called thermal conductors. Metals are very good thermal conductors. Materials that are poor conductors of thermal energy are called thermal insulators. Gases such as air and materials such as plastic and wood are thermal insulators
5 0
3 years ago
From the following statements about mechanical waves, identify those that are true for transverse mechanical waves only, those t
Dominik [7]

'In transverse waves, the particles of the medium move perpendicular to the direction of the flow of energy' is true for transverse waves only.

'In longitudinal waves, the particles of the medium move parallel to the direction of the flow of energy' is true for longitudinal waves only.

'Many wave motions in nature are a combination of longitudinal and transverse motion' is true for both longitudinal and transverse waves.

<u>Explanation:</u>

Longitudinal waves are those where the direction of propagation of particles are parallel to the medium' particles. While transverse waves propagate perpendicular to the medium' particles.

As wave motions are assumed to be of standing waves which comprises of particles moving parallel as well as perpendicular to the medium, most of the wave motions are composed of longitudinal and transverse motion.

So the option stating the medium' particle moves perpendicular to the direction of the energy flow is true for transverse waves. Similarly, the option stating the medium' particle moves parallel to the direction of flow of energy is true for longitudinal waves only.

And the option stating that wave motions comprises of combination of longitudinal and transverse motion is true for both of them.

5 0
2 years ago
Could anyone help me for this question please!! Really emergency!!!
kodGreya [7K]
16/9 m/s^2
negative 4/3 m/s^2
14 m/s
the last one is too detailed to do in my head while on the bus; sorry
5 0
3 years ago
Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. If there is no air resistance, when
Lelechka [254]

Answer:

option b

Explanation:

the heavier one will have twice the kinetic energy of the lighter one

5 0
3 years ago
Other questions:
  • True Or False;
    15·1 answer
  • What is the power involved in lifting a 10-kg object 1.0 m in 0.50 s?
    9·1 answer
  • If 20 beats are produced within one second, which of the following frequencies could possibly be held by two sound waves traveli
    11·2 answers
  • A box has a length of 18 cm, a height of 19 cm, and a width of 20 cm. What is its volume?
    12·2 answers
  • a ball is dropped from a height of 120 meters. If it takes 2.00 seconds for a ball to fall 60 meters, how long will it take the
    12·1 answer
  • When is the next total solar eclipse in illinois
    14·1 answer
  • What happens during an equinox?
    10·1 answer
  • Chris walks 25 m in the positive direction on a number line, then turns around and walks 15 m in the opposite direction. What is
    12·1 answer
  • This is the given equation of vibration of
    15·1 answer
  • What is 2 chemical properties of acids and bases
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!