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Mandarinka [93]
3 years ago
13

The data table depicts an object moving with changing speed. True False

Physics
2 answers:
Nimfa-mama [501]3 years ago
6 0
The answer is true. The table does show an object moving with changing speed.
hoa [83]3 years ago
5 0

Answer:

TRUE

Explanation:

Uniform speed means the object will travel in such a way that it must cover equal distance in equal interval of time.

So after each equal interval of time the distance moved by the object is same then it is uniform speed but if the object travel unequal distance  in equal interval of time then it is representing the changing speed.

So here we can see that object covers 1 m distance in first interval of 1 s while in next 1 s interval from t= 1 to t = 2 it moved total distance of d = 5 - 1 = 4 m

In next interval of 1 s from t = 2 to t =3 it moved total distance of d = 25 - 5 = 20 m

So here we can say that speed of the object is changing

So above statement is TRUE

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Fnet = fa + ff or fnet = fa - ff
skelet666 [1.2K]

Answer:first of all what is your question and i can give and example which is Use them when you have 2 forces named Fa & FF or Fg & Ff acting in opposite directions on an object and you need to know the resultant of your 2 forces.

Explanation:

i searched it up

5 0
3 years ago
A student is asked to determine the work done on a block of wood when the block is pulled horizontally using an attached string.
Lerok [7]

Answer:

D. Graphing the force as a function of distance and calculating the area under the curve.

Explanation:

5 0
4 years ago
Read 2 more answers
if for every force there is an equal and opposite reaction force, how is it possible for an object to accelerate
lesya692 [45]

Answer:

By the use of the reaction force one body is able to accelerate because it is not fixed to a rigid support which offers a materialistic resistance.

Explanation:

For every  force there is an equal and opposite reaction is stated in the Newton's third law of motion holds true universally.

This law accounts for the acceleration of the bodies with respect to the object that applies force on the other body. The acceleration is possible when iether one of the body is fixed and cannot move or when that both the bodies are not fixed can move.

  • For example consider a rocket with its engine started. This rocket generates upthrust by conversion of chemical energy of the fuel into the mechanical energy applying force on the launchpad. When this force is large enough it to lift the rocket then the rocket starts moving in the air and it  accelerates. Now, when it is in the air or in vacuum during the course of its journey it uses the reaction of the burnt gases of the fuel to change the momentum.

This is in accordance with the Newton's second law of motion, stating that the Force is directly proportional to the rate of change in momentum.

8 0
3 years ago
a straight, 2.5-m wire carries a typical household current of 1.5 a (in one direction) at location where the earth's magnetic fi
kotykmax [81]

Answer:

a

The magnitude of the force is  F=2.1*10^{-4}N

The direction is from south to north i.e upward

b

The magnitude of the force is  F=2.1*10^{-4}N

The direction is towards the west

c

The magnitude of the force is  F=2.1*10^{-4}N

the direction of the magnetic field is parallel to the direction of the current  (south to north ) hence the direction in 0 in comparison to the direction of the current

d

From the value of force  we got the answer to this question is No

Explanation:

Generally magnetic force is mathematically represented as

                  F = BIL

Where the B is the magnitude of the magnetic field which is given as

          B= 0.55 guass = \frac{0.55}{10000} = 0.55 *10^{-4}T

               I is the current with a value of I = 1.5A

               L is the length of the wire given as  L =2.5m

Substituting the value

             F =(0.55 *10^ {-4}) (1.5)(2.5)

                F=2.1*10^{-4}N

For the first case where the current is moving from west to east and we are told that the magnetic field is  from south to north the according to Fleming's right hand rule the force(exerted by earths magnetic field ) would be moving from south to north (i.e upward)

For the second case where current is moving vertically upwards the direction of the force is  to the west according to Fleming's right hand rule

 

7 0
3 years ago
Read 2 more answers
Which of the following is a chemical reaction? (Hint: Think of the table with signs of a chemical reaction.) A. A book being ope
dmitriy555 [2]
Answer is . .......”D”
7 0
3 years ago
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