All categories

4 years ago

What will happen to an object at rest if no unbalanced forces act on it,

Physics

2 answers:

Law Incorporation [45]4 years ago

5 0

Explanation:

Newton's first law says that an object at rest stays at rest, and an object in motion stays in motion, until acted upon by an unbalanced force.

If there's no unbalanced force, then an object at rest will stay at rest.

Lena [83]4 years ago

3 0

The object will stay at rest

You might be interested in

Which type of radiation has the lowest penetrating ability?

Ganezh [65]

The types of radiation are Alpha, Beta and gamma radiation

Alpha radiation: is a radiation of particles like He elements. It is very heavy radiation. it can be stopped by a sheet of a paper.

Beta radiation: is a radiation of particles like as the electrons, with the same mass and positive or negative charge. It can be stopped by an aluminium sheet

Gamma radiation: is an electromagnetic radiation with out really mass, moves in the speed of the light and has very high energy, high frequency and very short wavelengths. It can be stopped only by a block of concrete, lead, or other heavy shielding.

Thus, the radiation has the lowest penetrating ability is <u>Alpha radiation (particles)</u>

7 0

4 years ago

7. Two rocks are rolled down a hill at different speeds. At the bottom of the hill is a brick wall. Which rock will hit the bric

amm1812

Answer:

I think first rock is right answer

8 0

3 years ago

A 3.00 × 10^-6 kg ant rides the second hand of an enormous vertical wall clock. The ant smoothly sweeps a circle of radius 50.0

kotykmax [81]

Answer:

1.65×10⁻⁶ N

Explanation:

m = Mass of ant = $3\times 10^{-6}\ kg$

r = Radius = 50 m

t = Time taken to complete on rotation = 60 seconds

Angular velocity

$\omega=\frac{2\pi}{t}\\\Rightarrow \omega=\frac{2\pi}{60}$

Centripetal acceleration is force that is acting outward

$F_c=m\omega^2r\\\Rightarrow F_c=3\times 10^{-6}\times \left(\frac{2\pi}{60}\right)^2\times 50\\\Rightarrow F_c=1.65\times 10^{-6}\ N$

The magnitude of the upward force felt by the ant due to the second hand would be 1.65×10⁻⁶ N

4 0

3 years ago

For the following statements, indicate whether the statement is true or false and explain in words your reasoning.

Nataly [62]

Answer:

a) If I increase the number of moving charged particles per cubic meter in a conductor, I will have to increase the cross sectional area of the conductor to get the same amount of current for the same electric field in the conductor.

FALSE

As we know that

$I = neAv_d$

so here if we increase the number of charge per unit volume then we need to decrease the area to get same amount of current through the wire.

b) The change in magnetic flux in a closed loop induces an EMF that opposes the change in magnetic flux.

TRUE

As per lenz law the direction of induced EMF is always opposite to the change in the flux due to which EMF is induced in the closed loop.

c) The magnetic force per unit length of two long, parallel, current-carrying conductors is repulsive if the currents are flowing in the opposite direction.

TRUE

When magnetic field of first wire will interact with other then it will exert force on it

so here the force will be on other wire such that the two wire will repel when current in the two wires is opposite in direction.

d) . The total magnetic flux through a closed surface is equal to μ0I enclosed

FALSE

magnetic flux is the number of field lines passing through a given area

So it is given as

$B. A = 0$

8 0

3 years ago

An airplane is at rest on a runway. It accelerates at 10 m/s2 for 15 seconds. How fast is it now traveling?

KATRIN_1 [288]

Answer:

150

Explanation:

v = at

v = 10(15)

v = 150 m/s

6 0

4 years ago