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sukhopar [10]
4 years ago
12

If the force applied to a cart

Physics
1 answer:
lina2011 [118]4 years ago
8 0

True

Explanation:

  • If the force applied applied on a cart increases, the acceleration of the cart increases when the mass is held constant is very true.

Force and acceleration are directly proportional to one another:                                                 F  = m x a  

    m is the mass and a is the acceleration.

  • According to Newton's second law, "the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass".
  • The higher the force on an object, the faster it will accelerate.

Learn more:

Newton's law of motion brainly.com/question/11411375

#learnwithBrainly

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A housefly walking across a clean surface can accumulate a significant positive or negative charge. In one experiment, the large
nalin [4]

Answer:

1681714.28571 N/C

Yes it could exist

Explanation:

m = Mass of housefly = 12 m

q = Charge = 70 pC

g = Acceleration due to gravity = 9.81 m/s²

E = Electric field

When an object accumulates charge it means that it is gaining electrons making it negatively charged. This is the concept of static electricity.

Here, the electric force and the graviational force will balance each other

F_e=W\\\Rightarrow qE=mg\\\Rightarrow E=\frac{mg}{q}\\\Rightarrow E=\frac{12\times 10^{-6}\times 9.81}{70\times 10^{-12}}\\\Rightarrow E=1681714.28571\ N/C

1681714.28571 N/C of electric field would be required to levitate

The direction of the electric field would be upwards vertically.

In air the critical value of electric field is 3\times 10^6\ N/C which is more than the critical value of electric field in air. So, the electric field can exist.

5 0
3 years ago
To ancient peoples, why were planets special?
coldgirl [10]

Answer:

Planets were like gods.

Explanation:

To the people of many ancient civilizations, the planets were thought to be deities. Our names for the planets are the Roman names for these deities. For example, Mars was the god of war and Venus the goddess of love.

7 0
3 years ago
Planets beyond the solar system.On October 15, 2001, a planet was discovered orbiting around the star HD68988. Its orbital dista
Evgesh-ka [11]

Answer:

Part a)

M = 2.31 \times 10^{30} kg

Part b)

M = 1.15 M_s

Explanation:

Part a)

As we know that the period of revolution of the planet is given by

T = 2\pi\sqrt{\frac{r^3}{GM}}

now we know that

r = 10.5 \times 10^6 km = 1.05 \times 10^{10} m

T = 6.3 days

T = 5.44 \times 10^5 s

now we have

5.44 \times 10^5 = 2\pi\sqrt{\frac{(1.05\times 10^{10})^3}{(6.67 \times 10^{-11})M}}

M = 2.31 \times 10^{30} kg

Part b)

As we know that mass of sun is given as

M_s = 2.0 \times 10^{30} kg

now we have

\frac{M}{M_s} = \frac{2.31 \times 10^{30}}{2 \times 10^{30}}

M = 1.15 M_s

6 0
4 years ago
You need to design an experiment to measure the free-fall acceleration. You have an inclined plane made of steel and several obj
Nataliya [291]

Attached a diagram of the scheme described in the problem ..

To solve the problem we need to know the relationship between kinetic and normal force, so

F_k=\mu_k F_N (1)

Where

\mu_k = coefficient of kinetic

F_N=  Normal force

We perform the sum of forces as well,

\sum F_x = Ma(2)

a= Acceletarion

For Normal Force in Y,

F_N= Mgcos \theta  (3)

The force in X,

\sum F_x = Mgsin\theta - F_x (4)

Replacing in (4)

Ma = Mgsin\theta - \mu_k F_N

Ma = Mgsin\theta - \mu_k F_N

Ma = Mgsin\theta - \mu_k Mg cos\theta

a= g(sin\theta-\mu_k cos\theta)

In this way, it does not matter which object is chosen.

6 0
3 years ago
What is the pH of a solution with a hydrogen ion concentration of 2.0x10^3.(Use 3 digits)
Luba_88 [7]

Answer:

2.70

Explanation:

pH = -log[H+]

pH = -log[2.0x10^-3]

pH = 2.70

6 0
3 years ago
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