1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vladimir79 [104]
3 years ago
12

Please help.: Sliding from left to right in a straight line on a horizontal steel surface, an aluminum block weighing 20 newtons

is acted on by a 2.4 newton friction force. The block will be brought to rest by the friction force in a distance of 10 meters. Determine the magnitude of the acceleration of the block as it is brought to rest by the friction force. (Show all work)
Physics
2 answers:
Vlad [161]3 years ago
7 0
Mass of the block = 2/g = 2/9.8 =0.204 kg. 

Frictional force = mass * acceleration 

a = F/ m where F is the frictional force = 2.4 

a = 2.4/ 0.204 = 11.76 m/s^2 
-BARSIC- [3]3 years ago
7 0

Answer:

-1.176 m/s²

Explanation:

Given:

weight of aluminium block is w = 20.0 N

frictional force, f = 2.4 N

final velocity, v = 0

distance covered, d = 10 m

From Newton's second equation of motion,

F = ma

where, m is the mass and a is the acceleration.

mass of the block, m g = 20.0 N

m = 2.04 kg

The block is brought to rest by friction force:

f =- m a

⇒ 2.4 N = -(2.04 kg)(a)

⇒a = -1.176 m/s²

You might be interested in
If you run North for 5 meters and then East for 15 meters and then
kvasek [131]

Answer:

1m/s

Explanation:

D = 22m

T = 22s

S = 22÷22

= 1 m/s

7 0
3 years ago
Please help! i'll give brainliest!!
AleksAgata [21]

Answer:

it right. Its The Iron Nail i just did it and i got correct  (:

Explanation:

7 0
2 years ago
Read 2 more answers
Please help these with these two questions
Gennadij [26K]
<h2>If the distance between Earth and moon is increased , the gravitational force will decrease by a proportional amount .</h2><h2>The iron filings sprinkle around the magnet are arranged in regular pattern . The reason for this is that magnet can attract magnetic substances through various materials .</h2>

Explanation:

If the distance between Earth and moon is increased , the gravitational force will decrease by a proportional amount .

The iron filings sprinkle around the magnet are arranged in regular pattern . The reason for this is that magnet can attract magnetic substances through various materials .

8 0
3 years ago
A horizontal 803-N merry-go-round is a solid disk of radius 1.41 m and is started from rest by a constant horizontal force of 49
Slav-nsk [51]

Answer:

The kinetic energy of the disk is 254.4 J.

Explanation:

The kinetic energy of the disk is given by:

K = \frac{1}{2}I \omega^{2}

The moment of inertia of the solid disk is:

I = \frac{1}{2}mr^{2}

The mass is:

m = \frac{P}{g}

I = \frac{Pr^{2}}{2g} = \frac{803 N*(1.41 m)^{2}}{2*9.81 m/s^{2}} = 81.4 kgm^{2}

Now, we need to find the angular acceleration as follows:

\tau = I \alpha

Also, the torque is related to the tangential force:

\tau = F\times r

F\times r = I \alpha

\alpha = \frac{F \times r}{I} = \frac{49.7 N*1.41 m}{81.4 kg*m^{2}} = 0.86 rad/s^{2}

Now, we can find the angular speed:

\omega_{f} = \omega_{i} + \alpha t  

\omega_{i} = 0 since it is started from rest  

\omega_{f} = 0.86 rad\s^{2}*2.90 s = 2.50 rad/s

Finally, the kinetic energy of the disk is:

K = \frac{1}{2}I \omega^{2} = \frac{1}{2}81.4 kgm^{2}*(2.50 rad/s)^{2} = 254.4 J

Therefore, the kinetic energy of the disk is 254.4 J.

I hope it helps you!                                                                                                  

5 0
3 years ago
Which is the correct symbol for an isotope of bromine with 35 protons and 38 neutrons?
HACTEHA [7]

Answer:An atomic nucleus consists of protons and neutrons, collectively called nucleons. Although protons repel each other, the nucleus is held tightly together by a short-range, but very strong, force called the strong nuclear force.

Explanation:

An atomic nucleus consists of protons and neutrons, collectively called nucleons. Although protons repel each other, the nucleus is held tightly together by a short-range, but very strong, force called the strong nuclear force.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement describes absolute and apparent brightness?
    14·2 answers
  • A traveler first drives 18.6 km east, then 30.3 km southeast, and finally 10.7 km south. Find the traveler's total displacement
    14·1 answer
  • A missile is moving 1350 m/s at a 25° angle it needs to hit a target 23,500 m away in a 55° direction in 10.2 seconds what is th
    14·1 answer
  • What force (in N) does a trampoline have to apply to a 46.0 kg gymnast to accelerate her straight up at 5.30 m/s2? Note that the
    9·2 answers
  • A student allows the evaporating dish and the anhydrous salt for a long time on the lab bench. What will happen to the mass of t
    14·1 answer
  • A football is kicked with a velocity of 31 meters per second at an angle of 41 degrees what is the balls acceleration in the ver
    11·2 answers
  • Thoughts about controlling attitude of humankind is extended to nature when in fact humanity is part of nature
    7·1 answer
  • PLEASE ANSWER ASAP!
    15·1 answer
  • A solid weighs 237.5 g in air and 12.5 g in a liquid in which it is wholly submerged. The density of the liquid is 900 kg/m³.
    15·1 answer
  • A Person is carrying 6kg in one hand and 5kg in another.Calculate the resultant force applied by him​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!