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
Sedaia [141]
3 years ago
9

The spring constant in a given oscillating mass spring may be changed by

Physics
1 answer:
tia_tia [17]3 years ago
5 0
(D) None of the above.
You might be interested in
A projectile is launched at some angle to the horizontal with some initial speed vi, and air resistance is negligible.(a) Is the
Paul [167]

Answer:

Explanation:

When a projectile is launched at some angle to the horizontal with some speed vi , and air resistance is negligible , it is definitely a freely falling body .

It is so because it is free to accelerate towards the earth with acceleration of g . Air has no resistance , hence no force is acting on it except the gravitational force . Hence it is a freely falling body .

b )

The acceleration in the vertical direction is due to force exerted by the earth that is gravitational force on it  . Hence its  acceleration is equal to g in vertically downward direction .

c )

It has zero acceleration in horizontal direction . It is so because no force is acting on it in horizontal direction . So no acceleration will be present in horizontal direction . It will move in horizontal direction with constant speed of vi cos θ where θ is the angle vi make with the horizontal .

8 0
3 years ago
The coefficient of static friction between car's tires and a level road is 0.80 If car to be stopped in time of 3.0 sec its spee
Vlad1618 [11]

Answer:

23.5 m/s

Explanation:

The velocity of the car in decelerated motion is given by

v = u + at

where

v = 0 is the final velocity

u is the initial velocity

a is the acceleration of the car

t = 3.0 s is the time it takes for the car to stop

The acceleration of the car is given by the frictional force, which is the only force acting on the car along the direction of motion, so:

ma = -\mu mg\\a = -\mu g = -(0.80)(9.8 m/s^2)=-7.84 m/s^2

where

\mu=0.80 is the coefficient of friction

Solving the previous equation for u, we find the initial velocity:

u=v-at=0-(-7.84 m/s^2)(3.0 s)=23.5 m/s

4 0
4 years ago
What is the unit for height
juin [17]
The unit of height is:
Feet
Inches
Centimeters 

5 0
3 years ago
Read 2 more answers
Please help with these questions as well! I need urgent help! I will give brainliest! God bless!
Radda [10]

6.  Since we are not sure if the person in the question is actively lifting the crate, we have to determine the downwards force of the crate due to gravity and compare it to the normal force.  

F = ma

F = (15.3)(-9.8)

F = -150N

Since the downwards force of the crate is equivalent to the normal force, it means the person is applying no force in picking up the object.  So to pick up a 150N object from scratch, you would have to exert more force than the weight of the object, so the answer is 294N.


7.  Same idea as question 2.  

First determine the weight of the object:

F = ma

F = (30)(-9.8)

F = -294N

The crate in question is not moving, so the magnitudes of the forces in the upwards and downwards direction has to equal to 0.

-294 + 150N + x = 0

x = 144N  

So the person is exerting 144 N.


10.  First find the force of block B to the right due to its acceleration:

F = ma

F = (24)(0.5)

F = 12N

So block B is moving 12N to the right relative to block A due to block A's movement to the left.  However, block A is being applied a much greater force and is moving quicker to the left than block B is moving to the right of bock A.  The force that is causing block B to experience the lower relative force to the right is because of the friction.  To find the friction:

The sum of the forces in the leftward and rightward direction for block B must equal 12N.

75 - x = 12

x = 63N

So the force of friction of block A on block B is 63N to the left.


5 0
3 years ago
1. how do scientists classify small objects in solar system
polet [3.4K]
Option D is the correct answer. Option C is incorrect cuz temperature is not constant in outer space which makes difficult for classification. So composition of objects matters. Hence D. Hope it helps.
6 0
3 years ago
Read 2 more answers
Other questions:
  • For what value of the ratio r/a of plate radius to separation between the plates does the electric field at the point x=a/2 on t
    15·1 answer
  • A bike rider does work to get to the top of a mountain. How could you use the law of conservation of energy to describe his trip
    14·1 answer
  • Number 6 if you can please and thank you for your help
    8·1 answer
  • Example of predator-prey relationship on South Island
    14·1 answer
  • Hurry help please, number 3
    11·2 answers
  • Giving brainlist so plz help
    15·1 answer
  • Which describes the relationship between potential and kinetic energy of a ball thrown up in the air as it falls back to the gro
    13·1 answer
  • What is measurement​
    5·2 answers
  • A charging RC circuit controls the intermittent windshield wipers in a car. The emf is 12.0 V. The wipers are triggered when the
    14·1 answer
  • A ball at the top of a hill is an example of ______ and a ball rolling down the hill is an example of ______.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!