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NISA [10]
2 years ago
8

Four forces are acting on an object one force is pulling two Newtons to the left the second force is pulling 2 Newton’s up the t

hird is pulling three newton’s down and the last is pulling two newtons to the right what is the size and direction of the net force
Physics
1 answer:
Sedaia [141]2 years ago
7 0

Answer:

Explanation:

1. The net force acting on an object is the combination of all of the individual forces acting on it.

2. If two forces act on an object in opposite directions, the net force is the difference between the two forces.

3. If two forces act on an object in the same direction, the net force is the sum of the two forces.

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A ball is thrown up with a speed of 15m/s. How high will it go before it begins to fall? ( g = 10m/s2 )
LekaFEV [45]

Answer:

Height is 11.25m

Explanation:

<u>Given the following data;</u>

Initial velocity, u = 0

Final velocity, v = 15m/s

Acceleration due to gravity, g = 10m/s²

To find the height, we would use the third equation of motion;

V^{2} = U^{2} + 2aS

Where;

  • V represents the final velocity measured in meter per seconds.
  • U represents the initial velocity measured in meter per seconds.
  • a represents acceleration measured in meters per seconds square.
  • S represents the displacement (height) measured in meters.

V^{2} = U^{2} + 2aS

<em>Making S the subject, we have;</em>

S = \frac {V^{2} - U^{2}}{2a}

But a = g = 10m/s²

<em>Substituting into the equation, we have;</em>

S = \frac {15^{2} - 0^{2}}{2*10}

S = \frac {225 - 0}{20}

S = \frac {225}{20}

S = 11.25m

<em>Therefore, the ball will reach a height of 11.25m before it begins to fall. </em>

4 0
2 years ago
A police officer uses a radar gun to determine the speed of a car. A specialized radar gun uses ultraviolet light to determine s
lakkis [162]

Answer:

Radio Waves

Explanation:

Radio wave is a type of electromagnetic radiation notorious for their use in technologies used for communication like air traffic control, mobile phones, televisions and remote-controlled toys. Radio waves have the longest wavelength in the electromagnetic spectrum and are easily transmitted through air.

A radar gun uses radio waves to tell how far away an object is. To do that, the radar tool emits a focused radio wave and listens for any echo. If there is an item, say a car within the route of the radio wave, it's going to replicate some of the electromagnetic energy, and the radio wave will return to the radar gun. Radio waves flow via the air at a steady pace, so the radar gun can calculate how far the object is based totally on how long it takes the radio signal to return.

5 0
2 years ago
Assume your mass is 84 kg. The acceleration due to gravity is 9.8 m/s 2 . How much work against gravity do you do when you climb
KATRIN_1 [288]
M, mass=84 kg
height, h=3.9m
gravity, g= 9.8m/s2
W = F . d
F=force
d=Displacement
W=work done by force
Now by putting the values
F= m g (Acting downward )
d= h (Upward)
W= m g h ( work done against the force)
W= 84•9.8•3.9J
W= 3210.48
Therefore the answer will be 3210.48J.
7 0
2 years ago
When water molecules are disappearing into the air, there is a net _______?
MrRa [10]
Evaporation would be the answer.



7 0
2 years ago
What are the cahnges that a force can bring out on a body ? <br><br><br>Give examples
djyliett [7]
Hi Pupil Here is your answer ::




➡➡➡➡➡➡➡➡➡➡➡➡➡



1 The shape of the Body

Example : The shape of the ball lying on a floor can be changed by pressing it.


2 Direction of the Body

Example : The direction of motion of moving ball can be changed by hitting it with a bat.


3 The speed of the Body

Example : A ball at rest can be set in motion if force is applied only


4. Size of the Body

Example : The length of a spring tied and on one end can be increased by pulling it.




⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅




Hope this helps .......
5 0
3 years ago
Read 2 more answers
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