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olganol [36]
3 years ago
15

a given box of 2 kg is in contact with the floor experiences an applied force of 150 form somebody pushing it.while in motion,it

also experiences a frictional force of 7n in the opposite direction​. Calculate the weight of the box
Physics
1 answer:
ladessa [460]3 years ago
6 0

Weight = (mass) x (gravity)

Weight = (2kg) x (9.8 m/s^2)

Weight = 19.6 N

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When a football is kicked, the action and reaction forces do NOT cancel each other out because
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Answer:

C

Explanation:

The kicker exerts more force of the football which is why the football moves when its kicked.

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An electron is travelling in a straight line with a kinetic energy K = 1.60 x 10^-17J. What are (a) the magnitude and (b) the di
faust18 [17]

Answer:

(a) 1000 N/C

Explanation:

Kinetic energy of electron, K = 1.6 x 10^-17 J

distance, d = 10 cm = 0.1 m

Let the potential difference is V and the electric field is E.

(a) The relation between the kinetic energy and the potential difference is

K = e V

V = K / e

Where, e be the electronic charge = 1.6 x 10^-19 C

V = \frac{1.6\times 10^{-17}}{1.6\times 10^{-19}}

V = 100 V

The relation between the electric field and the potential difference is given by

V = E x d

100 = E x 0.1

E = 1000 N/C

(b) The force acting on the electron, F = q E

where q be the charge on electron

So, F = -e x E

It means the direction of electric field and the force are both opposite to each other.

The direction of electric field and the force on electron is shown in the diagram.

5 0
3 years ago
Three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another. The cubes are lined up
Westkost [7]

Answer:

24 N

Explanation:

m = mass of the cube = 6.0 kg

Consider the three cubes together as one.

M = mass of the three cubes together = 3 m = 3 (6.0) = 18 kg

a = acceleration of the combination = 2 ms⁻²

F = Force applied on the combination

Using Newton's second law

F = ma = (18) (2) = 36 N

F_{L} = Force by the left cube on the middle cube

Consider the forces acting on left cube, from the force diagram, we have

F - F_{L} = ma \\36 - F_{L} = (6) (2)\\F_{L} = 24 N

4 0
2 years ago
Isabella drops a pen off her balcony by accident while celebrating the successful completion of a physics problem.
Studentka2010 [4]

Answer:

2 seconds

Explanation:

v = at + v₀

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t = 2 s

6 0
3 years ago
Read 2 more answers
Balanced or Unbalanced?
Galina-37 [17]

Unbalanced because if it is pushing then stopping, that means that it is unbalanced.

6 0
3 years ago
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