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
Zielflug [23.3K]
3 years ago
9

You are in your car at rest when the traffic light turns green. You place your coffee cup on the horizontal dash and hit the gas

. The coffee cup does not slide as you accelerate forward. The work done by friction on your coffee cup is
a. equal to zero.

b. positive.

c. equal to the nonconservative work done by the car's engine.

d. negative.

e. equal in magnitude to the work done by the road on the car.
Physics
1 answer:
umka21 [38]3 years ago
3 0

Answer:

(d) Negative.

Explanation:

let's test each at a time.

(a) It can't be 0, because cup would slide back other wise.

(b) Positive, well if forward is positive, than the work done against the forward acceleration must be negative , so it can't be positive.

(c) Equal to non-conservative work done by the car's engine.

well no, because work done by car's engine dosen't go all of it into getting car to move, so it can't be that.

(d) negative, this look like it, because work that friction does must be nagative to counteract positive thrust of car which is positive and in forward direction.

(d) this can't be true.

So the answer is (d) negative.

You might be interested in
What is electricity
irina [24]
D I know this is right
5 0
2 years ago
Consider a book that weighs 15 N at rest on a flat table. How many newtons of support does the table provide?
zysi [14]
<span>The support force is 15 N. The net force on the book is zero.</span>
7 0
3 years ago
A ____________ galaxy has arms of gas and dust; where as _____________ galaxy is a category of galaxy that does not have a disti
Jet001 [13]

Answer:

spiral, an irregular

Explanation:

i took the test :)

3 0
3 years ago
Question 3 of 32
Scorpion4ik [409]

Answer:

the clown can be put on a sealion and the other clown can hold a lot of peole  he help a clown that was tall and heivy

Explanation:

3 0
2 years ago
It is known that a shark can travel at a speed of 17 m/s. How far can a shark go in 8 seconds? (please show steps to how you got
Alex777 [14]

Answer:

136 meters.

Explanation: If it can go 17 meters a second, then after 8 seconds, it will go 136 meters. Multiple 17 by 8 to get your answer.

4 0
3 years ago
Other questions:
  • Two vectors A and B are added together to form a vector C. The relationship between the magnitudes of the vectors is given by A
    6·1 answer
  • Biological factor related to antisocial personality disorder is
    7·2 answers
  • What component of a longitudinal sound wave is analogous to a trough of a transverse wave?
    13·1 answer
  • A person holding a 30 kg box 1 m above the floor puts it down. How much work was done ? Remember , the force of an objects weigh
    6·2 answers
  • If you see a lightning stroke and then, 15 seconds later, hear the thunder, the lightning is about ____ miles away
    13·1 answer
  • A cheetah can run at approximately 100 km/hr and a gazelle at 80.0 km/hr. If both animals are running at fullspeed, with the gaz
    5·1 answer
  • A roller coaster car is released from rest as shown in the image below. If
    13·1 answer
  • Jus de fruits frais
    8·1 answer
  • Gabrielle has just upgraded her oil-burning furnace. Her new furnace takes cool air from outside and passes it through the heat
    13·1 answer
  • A 58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move towards 3rd base with a velocity of 38.0 m/s. What i
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!