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Svetllana [295]
3 years ago
6

Why is it sensible on diagrams to represent a force by an arrow?

Physics
1 answer:
german3 years ago
8 0
Two things are needed to complerely describe a force: its strength and its direction. An arrow indicates both.
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Car's mass is 950kg. It's driven at 100km/h. How big is the kinetic energy?
polet [3.4K]

Answer:

4750000 J

Explanation:

Kinetic Energy= 1/2* mass* velocity²

1/2*950*100²=4750000

8 0
3 years ago
How does the electric field intensity vary with the increase of distance of the point from the centre of a charged conducting sp
Nataly_w [17]

Answer:

(i)  Electric field outside the shell:

For point r>R; draw a spherical gaussian surface of radius r.

Using gauss law, ∮E.ds=q0qend

Since E is perpendicular to gaussian surface, angle betwee E is 0.

Also E being constant, can be taken out of integral.

So, E(4πr2)=q0q

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3 years ago
Marcie shovels snow after a storm by exerting a force of 32 N on her shovel at an angle of 50 degrees to the vertical. What is t
gulaghasi [49]

Answer:

The horizontal component of the force exerted by Marcie is 25 N

Explanation:

Lets explain how to solve the question

Marcie shovels snow after a storm by exerting a force of 32 N on her

shovel at an angle of 50 degrees to the vertical

We need to find the horizontal component of the force exerted by Marci

The force direction is 50° to the vertical means

→ tan(50) = \frac{Fx}{Fy} , where x is the horizontal component

of the force and y is vertical component

→ tan(50) = \frac{sin(50)}{cos(50)}

By comparing between the two expressions of tan(50)

→ The horizontal component is Fx = F sin(50)

→ The vertical component is Fy = F cos(50)

We need the horizontal component

→ F = 32 N

→ The horizontal component = 32 sin(50) = 24.51 N ≅ 25 N

<em></em>

<em>The horizontal component of the force exerted by Marcie is 25 N</em>

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