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Lina20 [59]
3 years ago
6

a box is pushed 40 m by a mover. the amount of work done was 2,240 J. How much force was exerted on the box

Physics
1 answer:
Katyanochek1 [597]3 years ago
3 0
56 is da answer u has divided
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A car of mass m goes around a banked curve of radius r with speed v. If the road is frictionless due to ice, the car can still n
Sholpan [36]

Answer:

horizontal component of normal force is equal to the centripetal force on the car

Explanation:

As the car is moving with uniform speed in circle then the force required to move in the circle is towards the center of the circle

This force is due to friction force when car is moving in circle with uniform speed

Now it is given that car is moving on the ice surface such that the friction force is zero now

so here we can say that centripetal force is due to component of the normal force which is due to banked road

Now we have

N sin\theta = \frac{mv^2}{R}

N cos\theta = mg

so we have

v = \sqrt{Rg tan\theta}

so this is horizontal component of normal force is equal to the centripetal force on the car

5 0
3 years ago
What is the Electron Geometry of a AB4 molecule? A. bent B. trigonal planar C. linear D. tetrahedral
34kurt

Answer:

D.Tetrahedral

Explanation:

The central atom has 0 lone pair and 4 bond pairs. Hybridization is sp³. The geometry is tetrahedral which has an angle of 109.5°.

According to VSEPR theory, each molecule arranges itself such that it faces minimum repulsion and the given molecule is of type AB_4.

Therefore the answer will be D.

D.Tetrahedral

4 0
3 years ago
The reaction between magnesium (Mg) and oxygen (O2) forms magnesium oxide (MgO).
Scorpion4ik [409]

Answer:

2 Mg + O2 = 2MgO

Type: Synthesis

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3 years ago
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

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3 years ago
Which piece of evidence did Alfred Wegener use to develop the theory of continental drift?
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The right answer for the question that is being asked and shown above is that: "A.tectonic activity concentrated in certain areas." A piece of evidence did Alfred Wegener use to develop the theory of continental drift is that <span>A.tectonic activity concentrated in certain areas</span>
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