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
IgorLugansk [536]
4 years ago
5

a 10kg box is pulled up a ramp that is at an angle of 20 degrees with the horizontal if the pulling force of 70 N causes an acce

leration of 2.0m/s^2 find the friction

Physics
1 answer:
ivolga24 [154]4 years ago
3 0

Answer:

Friction = 15.80 Newton

Explanation:

    given

             A pulling force (F) is 70N acting on the block of 10kg (M) which is placed on the ramp which is at an angle of 20° with the horizontal.

            Irrespective to the ramp ,Weight of the body acts vertically downward , if we resolve the components of W=Mg as Mgsin20° (along the ramp) and Mgcos20° (perpendicular to the ramp) as shown in the attachment which contains FBD of the block

           as given the body is Accelerating with an acceleration (a) of 2 m/s^{2} due to the pulling force . As friction always opposes the motion it acts in the backward direction to the pulling force .as shown in the figure attached

         By Newton's 2nd Law

                 Ma = F - MgSin20°-friction

                by subtituting the values we get

                10(2) = 70 - 10(10)sin20° - friction

                  friction =70 - 100sin20° -20

                  friciton = 15.7979N

                  by rounding of ,

                              Frictional force is 15.80 Newton

           

You might be interested in
In a model of the solar system that was about as large as a college campus how large would the Sun be?
nordsb [41]
Small car is the answer
8 0
3 years ago
A stone is thrown upward at an angle. what happens to the horizontal component of its velocity as it rises? as it falls?
Ne4ueva [31]
<span>Rising or falling, it does not change.</span>
5 0
3 years ago
What do all types of electromagnetic radiation have in common?
Andrew [12]
<span>They are emitted by the unstable nuclei of certain atoms.
 That's all I could find out; Sorry I couldn't be more of an help.</span>
5 0
3 years ago
When performing an.experiment similar to Millikan's oil drop, a student measured the following load magnitudes: 3.26x10 ^-19 C 5
Scilla [17]

Answer:

1.6 x 10⁻¹⁹ C

Explanation:

Let us arrange the charges in the ascending order and round them off as follows :-

1.53 x 10⁻¹⁹ C   → 1.6x 10⁻¹⁹ C

3.26 x 10⁻¹⁹C   → 3.2 x 10⁻¹⁹ C

4.66 x 10⁻¹⁹C   → 4.8 x 10⁻¹⁹ C

5.09 x 10⁻¹⁹C   → 4.8 x 10⁻¹⁹ C

6.39 x 10⁻¹⁹C   → 6.4 x 10⁻¹⁹ C

The rounding off has been made to facilitate easy calculation to come to a conclusion and to accommodate error in measurement.

Here we observe that

2 nd charge is almost twice the first charge

3 rd and 4 th charges are almost 3 times the first charge

5 th charge is almost 4 times the first charge.

This result implies that 2 nd to 5 th charges are made by combination of the first charge ie if we take e as first  charge , 2nd to 5 th charges can be  written as 2e,  3e ,3e and 4e. Hence e is the minimum charge existing in nature and on electron this minimum charge of  1.6 x 10⁻¹⁹ C  exists.

3 0
3 years ago
Suzy drops a rock from the roof of her house. Mary sees the rock pass her 2.9 m tall window in 0.134 sec. From how high above th
timama [110]

Answer:

Explanation:

Given

length of window h=2.9\ m

time Frame for which rock can be seen is \Delta t=0.134\ s

Suppose h is height above which rock is dropped

Time taken to cover h+2.9 is t_1

so using equation of motion

y=ut+\frac{1}{2}at^2

where  y=displacement

u=initial velocity

a=acceleration

t=time

time taken to travel h  is

h=0+0.5\times g\times (t_2)^2---2

Subtract 1 and 2 we get

2.9=0.5g(t_1^2-t_2^2)

5.8=g(t_1+t_2)(t_1-t_2))

and from equation t_1-t_2=0.134\ s

so t_1+t_2=\frac{5.8}{9.8\times 0.134}

t_1+t_2=4.416\ s

and t_1=t_2+\Delta t

so t_2+\Delta t+t_2=4.416

2t_2+0.134=4.416

t_2=0.5\times 4.282

t_2=2.141\ s

substitute the value of t_2 in equation 2

h=0.5\times 9.8\times (2.141)^2

h=22.46\ m

                                                     

8 0
4 years ago
Other questions:
  • How would the number 56,780,000,000 be written in scientific notation?
    14·1 answer
  • After the fission of U-235 takes place, how many neutrons does the missing nucleus have?
    7·2 answers
  • If an object on Earth weighs 100N what is its weight in pounds?
    13·1 answer
  • Evaluating an experiment provides a scientist with an opportunity to check for errors in experiment design.
    12·1 answer
  • An object is weighed at different locations on the
    11·2 answers
  • Galileo was a contemporary of
    8·1 answer
  • K i Illeanalu plo,ppio<br>ng"i​
    8·2 answers
  • Entropy is the amount of heat a system releases. true or false?​
    12·2 answers
  • Why does oil not dissolve in water?
    11·1 answer
  • Hello guys I have a quick question and please help me! Thanks!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!