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anastassius [24]
3 years ago
14

A constant force is applied to a body that is already moving. The force is directed at an angle of 60 degrees to the direction o

f the body's velocity. What is most likely to happen is that: the body will stop moving. the body will move in the direction of the force. the body's velocity will increase in magnitude but not change direction. the body will gradually change direction more and more toward that of the force while speeding up. the body will first stop moving and then move in the direction of the force.
Physics
1 answer:
levacccp [35]3 years ago
3 0

Answer:

the body will gradually change direction more and more toward that of the force while speeding up.

Explanation:

From the question we were told that constant force is applied to a body that is already moving

if the applied force is in opposite direction to the motion of the object, there would be deceleration.

Whenever a force is applied to moving body , acceleration will occur in the body if the force and the motion of the body act in the same direction.

However in case of the question since the force is directed at an angle of 60 degrees to the direction of the body's velocity then the body will gradually change direction more and more toward that of the force while speeding up.

.

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Choose the correct statement below about the interaction between magnets, magnetic materials and charges.
bekas [8.4K]

Answer: B. The south magnetic pole attracts the north pole of another magnet.

Explanation:

The correct statement below about the interaction between magnets, magnetic materials and charges is that the south magnetic pole attracts the north pole of another magnet.

We should note that a magnet typically consists of two poles which are the North Pole and the South pole. The opposite poles doesn't repel each other but attracts each other while same pole repels one another.

In this case, the North Pole will attract the South Pole while same magnetic piles repel e.g the North Pole will repel the North Pole.

5 0
4 years ago
Two electric motors drive two elevators of equal mass in a three-story building 10 meters tall. Each elevator has a mass of 1,00
wlad13 [49]

Answer:

Power output = 2\times 10^4\ W

Explanation:

Given:

Mass of the elevator is, m=1000\ kg

Height to which it is raised is, h=10\ m

Acceleration due to gravity is, g=10\ m/s^2(Approximately)

Time taken by the motor to raise the elevator is, t=5.0\ s

Now, work done on the elevator by the motor is equal to the increase in the gravitational potential energy of the elevator.

Increase in gravitational potential energy is given as:

\Delta U=mgh=(1000)(10)(10)=10\times 10^4\ J

Therefore, work done by motor is, W=10\times 10^4\ J

Now, we know that, power is work done in unit time. So, power output is given as:

Power=\frac{W}{t}\\\\Power=\frac{10\times 10^4\ J}{5.0\ s}\\\\Power=2\times 10^4\ J/s\\\\Power=2\times 10^4\ W..........[1 W = 1\ J/s]

Therefore, the power output of the first motor is 2\times 10^4\ W

7 0
4 years ago
The speed of an electromagnetic wave is a constant, 3.0 × 108 m/s. The wavelength of a wave is 0.3 meters. What is the frequency
marusya05 [52]

Answer: option B. 1.0 × 10⁹ Hz


Explanation:


The speed, s, of a wave, equals the product of its frequency, ν, times its wavelength, λ:

  • s = νλ.

As the question states, the speed of an electromagnetic wave is a constant, c, equal to 3.0 × 10⁸ m/s.


Substituting this constant in the equation for the speed of the wave, you get:

  • c =  νλ.

From that equation, you can solve for the frequency to show the inverse realation of frequency and wavelength:

  • ν =  c / λ

Now, you just have to substitute values and compute:

  • ν =  c / λ = 3.0 × 10⁸ m/s / 0.3m = 10. × 10⁸ Hz = 1.0 × 10⁹ Hz
5 0
3 years ago
An object is positioned in front of a concave mirror behind the center of curvature. Choose the ray diagram that shows
gladu [14]

Answer:

The third diagram

Explanation:

3 0
3 years ago
Read 2 more answers
A cubical box, 5.00 cm on each side, is immersed in a fluid. The gauge pressure at the top surface of the box is 594 Pa and the
frutty [35]

Answer:

The density of the fluid is 1100 kg/m³.

Explanation:

Given that,

Height = 5.00 cm

Pressure at top =594 Pa

Pressure at bottom = 1133 Pa

We need to calculate the change in pressure

Using formula of change in pressure

\Delta P=P_{b}-P_{t}

Where, P_{b} = Pressure at bottom

P_{t} = Pressure at top

put the value into the formula

\Delta P=1133-594

\Delta P=539\ Pa

Using formula of pressure for density

\Delta P = \rho g h

\rho =\dfrac{\Delta P}{gh}

Where, \rho = density

P = pressure

h = height

Put the value in to the formula

\rho =\dfrac{539}{5.00\times10^{-2}\times9.8}

\rho =1100\ kg/m^3

Hence, The density of the fluid is 1100 kg/m³.

8 0
3 years ago
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