Anything that has mass and occupies space is defined as.

Galina-37 [17]

There would be two forces acting on the box parallel to the floor, with a net force of

∑ F = p - f = m a

where p = magnitude of the push, f = mag. of friction, m = mass of the box, and a = acceleration. To find p, we first need f .

There are also only two forces acting on the box perpendicular to the floor, with net force

∑ F = n - w = 0

where n = mag. of normal force of the floor on the box and w = weight of the box. The net force is 0 because the box is only accelerating parallel to the floor.

w = m g, where g = 9.8 m/s² is the mag. of the acceleration due to gravity, so we can solve for n :

n = w = m g

n = (22 kg) (9.8 m/s²)

n = 215.6 N

The kinetic friction is proportional to the normal force by a factor of the given coefficient of friction, µ = 0.17, such that

f = µ n

f = 0.17 (215.6 N)

f = 36.652 N

Now solve for the required pushing force:

p - 36.652 N = (22 kg) (1.9 m/s²)

p ≈ 78 N

4 0

4 years ago

Read 2 more answers

A 15.0 m \long copper wire, 2.20 mm in diameter including insulation, is tightly wrapped in a single layer with adjacent coils t

Hoochie [10]

a) 0.5 m

b) $4.77\cdot 10^{-3} T$

Explanation:

a)

At the beginning, the length of the copper wire is:

L = 15.0 m

and the diameter (so, the thickness of each adjacent circle) is

$t=2.20 mm = 0.0022 m$

While the diameter of one circle of the solenoid is

$d=2.10 cm = 0.021 m$

So the perimeter of one circle is

$p=\pi d=\pi (0.021)=0.0659 m$

So the number of complete circles in the solenoid is

$n=\frac{L}{p}=\frac{15.0}{0.0659}=227.6$

The tickness of one circle is $t$ , so the total length of the solenoid will be:

$L'=nt=(227.6)(0.0022)=0.5 m$

b)

The magnetic field at the center of a solenoid is given by

$B=\mu_0 n I$

where

$\mu_0$ is the vacuum permeability

n is the number of turns of the solenoid

I is the current in the solenoid

Here we have:

$\mu_0 =4\pi \cdot 10^{-7}H/m$ is the vacuum permeability

$n=227.6$ is the number of turns in the solenoid (calculated in part a)

I = 16.7 A is the current in the solenoid

Substituting, we find:

$B=(4\pi \cdot 10^{-7})(227.6)(16.7)=4.77\cdot 10^{-3} T$

5 0

3 years ago

Matter's resistance to a change in motion is called _____ and is directly proportional to the mass of an object. For an object t

ad-work [718]

Answer:

B) Inertia is the resistance of any physical object

5 0

3 years ago

Someone help find centripetal acceleration plus centripetal force!

Arte-miy333 [17]

Answer:Centripetal force that acts an object keep it along a moving circular path.

Explanation:Centripetal force along a path circular of radius(r) with velocity(V) acceleration the center of the path.

a=v/r

object will along moving continue a straight path unless by the external force.External force is the centripetal force.

Centripetal force is to moving in horizontal circle,Centripetal force is not a fundamental force.Gravitational force satellite and orbit of centripetal force.

8 0

4 years ago

A truck moves 100 miles to the south in 2 hours. What is the trucks velocity

ruslelena [56]

v = d/t

v = 100/2

v=50

50 mph

3 0

4 years ago