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
frozen [14]
3 years ago
7

A roller coaster car starts from rest at the top of a track 35.5 m long and inclined at 40.0° to the horizontal. Assume that fri

ction can be ignored. (a) What is the acceleration (in m/s2) of the car?
Physics
2 answers:
Yakvenalex [24]3 years ago
7 0

Answer:

a = 6.31 m/s²

Explanation:

a) The acceleration of the car can be found using the Newton's second law:

F = ma

W = ma

mgsin(\theta) = ma

<u>Where:</u>

F: is the net force acting on the car

m: is the mass

a: is the acceleration of the car

W: is the weight of the car

θ: is the angle = 40.0°    

g: is the gravity = 9.81 m/s²

Hence, the acceleration is:

a = gsin(\theta) = 9.81 m/s^{2}*sin(40.0) = 6.31 m/s^{2}

Therefore, the acceleration of the car is 6.31 m/s².

I hope it helps you!

Aleks [24]3 years ago
6 0

Complete question:

A roller coaster car starts from rest at the top of a track 35.5 m long and inclined at 40.0° to the horizontal. Assume that friction can be ignored.

(a) What is the acceleration (in m/s2) of the car?

(b) How much time elapses before it reaches the bottom of the track?

Answer:

(a) the acceleration of the car is 6.30 m/s²

(b) elapsed time before it reaches the bottom of the track is 3.36 s

Explanation:

Given;

length of the track, L = 35.5 m

angle of inclination of the track, θ = 40°

initial velocity of the roller coaster, u = 0

Part (a) the acceleration of the car

From Newton's second law;

F = ma = mgsinθ

a = gsinθ

a = 9.8 x sin40

a = 6.30 m/s²

Part (b) elapsed time before it reaches the bottom of the track

Applying kinematic equation;

L = ut + ¹/₂at²

35.5 = 0 + ¹/₂(6.3)t²

35.5 = 3.15t²

t² = 35.5 / 3.15

t² = 11.2698

t = √ 11.2698

t = 3.36 s

You might be interested in
2. A rock is shot straight up into the air with a slingshot that had been stretched 0.30 m. Assume
Luba_88 [7]

Answer:

e

Explanation:

4 0
3 years ago
Read 2 more answers
A physics major is cooking breakfast when he notices that the frictional force between the steel spatula and the Oiled Steel fry
Alinara [238K]

Answer:

N  = 6.67 N

Explanation:

The frictional or frictional force is a force that arises from the contact of two bodies and opposes movement.

The friction is due to imperfections and roughness, mainly microscopic, that exist on the surfaces of the bodies. Upon contact, these roughnesses engage with each other making movement difficult. To minimize the effect of friction, either the surfaces are polished or lubricated, since the oil fills the imperfections, preventing them from snagging.

As the frictional force depends on the materials and the force exerted on one another, its magnitude is obtained by the following expression:

f = μ*N    Formula (1)

where:  

f is the friction force  (N)

μ is the coefficient of friction

N is the normal force (N)

Data

f = 0.2 N : frictional force between the steel spatula and the Oiled Steel frying pan

μ = 0.03 :coefficient of kinetic friction between the two materials

Calculating of normal force

We replace data in the formula (1)

f = μ*N  

0.2  = 0.03*N  

N  = 0.2 / 0.03

N  = 6.67 N

5 0
4 years ago
If the is the absense of light is the dark. thennnnnnnnnn since there is light particles. is there dark particles?if not then im
TEA [102]
sis
I’m dum too
Have a good day
7 0
3 years ago
Read 2 more answers
Which of the following is an example of an electromagnetic wave? (2 points)
Maru [420]
A) red light
red lights are an example of an electromagnetic wave. visible lights are the only electromagnetic waves we can actually see on the spectrum. red, in particular has the biggest wavelength.

b) ocean waves
ocean waves are not an electromagnetic wave. in fact, it’s a mechanical wave. electromagnetic waves can travel through a vacuum, that is empty space, but mechanical waves cannot.

c) sound waves
sound waves are also not an electromagnetic wave. it’s a mechanical wave. you cannot hear electromagnetic waves.

d) earthquakes
an earthquake is also not an example of electromagnetic waves. it’s a mechanical wave.

hope this helps!
4 0
4 years ago
Read 2 more answers
A track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis (Fig. 11-48).A toy train
masya89 [10]

Answer:

0.166 rad/s

Explanation:

See attachment for calculations

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the relationship between gravity and electromagatism?
    13·1 answer
  • Two like charges are separated by some distance. Describe the quantitatively what will happen to the force exerted by one charge
    10·1 answer
  • Water can dissolve almost anything in the universe
    14·1 answer
  • PLEASE HELP!!!!!!!! More science questions coming soon!!
    8·1 answer
  • What happens when saltwater is made? A) The salt crystals sink to the bottom of the water. B) The salt crystals split into ions.
    12·2 answers
  • How do theories differ from Laws and Principles?
    6·1 answer
  • Which statement is true about a planet’s orbital motion?
    15·1 answer
  • A food processor draws 8.47 A of current when connected to a potential difference of 110 V.
    13·1 answer
  • Write a 5-8 sentence summary on Earthquakes.
    5·1 answer
  • Can someone please help me?? i’ll give brainilist
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!