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
marysya [2.9K]
4 years ago
15

16. A block is sitting on a ramp tilted from horizontal. The block is just about to slide. T he angle of the ramp relative to ho

rizontal is 14 degrees. What is the coefficient of friction between the block and the ramp? a. 0.25 b. 0.97 c. 0.5 d. 0.1 e. 0.34
Physics
1 answer:
Shalnov [3]4 years ago
5 0

Answer:

option A

Explanation:

given,

angle of inclination = 14°

block is resting on the inclined plane.

Let m be the mass of the block

vertical component of forces

∑F_y = 0

N_r - mg cos θ = 0

N_r = m g cos θ.............(1)

along the plane of slide

f_r = μ N_r

μ N_r = mg sin θ............(2)

dividing equation (2)/(1)

μ = tan 14°

μ = 0.25

correct answer is option A

You might be interested in
A 2500‐kg vehicle traveling at 25 m/s can be stopped by gently applying the breaks for 20 seconds. What is the average force sup
katen-ka-za [31]
Momentum = (mass) x (speed)

Change in momentum = (force) x (time)

The initial momentum is (mass) x (speed) = 2500x 25 = 62,500 kg-m/s.

Since you want to <u>stop</u> the vehicle, that number is also the required <em>change</em>
in momentum ... you want the vehicle to wind up with zero momentum.

62,500 = (force) x (time) = 20 x force

Divide each side by 20 :

force = 62,500 / 20 = <em>3,125 newtons </em>
3 0
3 years ago
what is the definition of sonic booms? HELP ASAP 50 POINTS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! and breainliest
Morgarella [4.7K]

Answer:

a loud explosive noise caused by the shock wave from an aircraft traveling faster than the speed of sound.

Explanation:

8 0
3 years ago
Read 2 more answers
Echoic sensory memory is used when a lightning bolt flashes across the sky.
Ahat [919]
If the statement above answers whether the statement is true or false, then the answer is false. It is not true that the echoic sensory memory is used when a lightning bolt flashes across the sky because it does not have that kind of capacity. The echoic sensory memory is the one responsible for the auditory information.
6 0
3 years ago
Read 2 more answers
Which image shows a non renewable resources?
Radda [10]

Where are the images?!?!?

5 0
3 years ago
Read 2 more answers
Suppose that you can throw a projectile at a large enough v0 so that it can hit a target a distance R downrange. Given that you
NikAS [45]

Answer:

Theta1 = 12° and theta2 = 168°

The solution procedure can be found in the attachment below.

Explanation:

The Range is the horizontal distance traveled by a projectile. This diatance is given mathematically by Vo cos(theta) t. Where t is the total time of flight of the projectile in air. It is the time taken for the projectile to go from starting point to finish point. This solution assumes the projectile finishes uts motion on the same horizontal level as the starting point and as a result the vertical displacement is zero (no change in height).

In the solution as can be found below, the expression to calculate the range for any launch angle theta was first derived and then the required angles calculated from the equation by substituting the values of the the given quantities.

7 0
3 years ago
Other questions:
  • In the sentence Argon has several properties distinct from other gases", what does distinct mean?
    11·1 answer
  • A radioactive isotope is a type of ________ that will change into another isotope.
    11·1 answer
  • A physics student throws a ball straight up. The student catches the ball in exactly the same place from which it was released.
    15·1 answer
  • Someone tells you that scientific knowledge cannot be changed or modified. How would you answer this statement?
    12·1 answer
  • Between a piece of paper and a rock, which will fall the fastest and why?
    6·1 answer
  • 16. When a plastic rod is rubbed with fur, the rod will become negatively charged. Which of the following best explains how this
    8·1 answer
  • Two resistors, R1=2.79 Ω and R2=6.37 Ω , are connected in series to a battery with an EMF of 24.0 V and negligible internal resi
    7·1 answer
  • (a) A load of coal is dropped (straight down) from a bunker into a railroad hopper car of inertia 3.0 × 104 kg coasting at 0.50
    15·1 answer
  • In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is 1.18 m. The mug
    7·1 answer
  • A car reaches 80 kilometers per hour, then suddenly crashes into the concrete wall
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!