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Varvara68 [4.7K]

3 years ago

8

True or false. a- Magnetic force is a force acting from a distance.

1 answer:

mrs_skeptik [129]3 years ago

8 0

I don’t understand your question, can you go into more detail please

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Suppose that a 1000 kg car is traveling at 25 m/s (aprox 55mph). Its brakes can apply a force of 5000N. What is the minimum dist

Brrunno [24]

Assuming the the car is travelling to the right (→):

$R(\rightarrow), F = ma$

$\implies a = \frac{F}{m}$

$= \frac{-5000}{1000}$

$= -5 \ ms^{-2}$

The information we know:

$u = 25 \ ms^{-1}$

$v = 0$

$a = -5 \ ms^{-2}$

Using one of the equations of motion:

$v^2 = u^2 + 2as$

$\implies s = \frac{v^2 -u^2}{2a}$

$= \frac{0^2 - 25^2}{2\times (-5)}$

$= \frac{625}{10}$

$= 62.5\ m$

8 0

3 years ago

Read 2 more answers

What is the momentum of the wooden ball after the Collision

Rzqust [24]

Look it up on google copy and paste

7 0

3 years ago

If a textbook weighs 37.2 N on Venus, and the book has a mass of 4.4 kg, what is the strength of gravity on Venus?

Romashka [77]

$F=ma$

Where F is force, m is mass and a is acceleration.

$37.2N=4.4kg\cdot a\Longrightarrow a=\dfrac{37.2N}{4.4kg}=\boxed{8.45\dfrac{m}{s^2}}$

Hope this helps.

r3t40

4 0

3 years ago

A car of mass 1230 kg is on an icy driveway inclined at an angle of 39°. The acceleration of gravity is 9.8 m/s². θ If the incli

tamaranim1 [39]

Answer:

Acceleration of the car, $a=6.16\ m/s^2$

Explanation:

It is given that,

Mass of the car, m = 1230 kg

The car is inclined at an angle of 39 degrees.

The acceleration of gravity acting on the car is $9.8\ m/s^2$ . The component of car parallel to inclined planes is :

$W_x=mg\ sin\theta$

Net force acting on it is :

$ma=mg\ sin\theta$

$a=g\ sin\theta$

$a=9.8\times \ sin(39)$

$a=6.16\ m/s^2$

So, the acceleration of the car is $6.16\ m/s^2$ . Hence, this is the required solution.

6 0

4 years ago

The vertical normal stress increase caused by a point load of 10 kN acting on the ground surface at a point 1m vertically below

Tomtit [17]

Answer:

(b) 4.775 kN

Explanation:

see the attached file

8 0

3 years ago