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Two care are moving in same direction in parallel lanes along a highway. At some instant, car A is traveling faster than car B. Does that mean that acceleration of A is greater than that of B at that instant?

(a) Yes, at any instant, a faster object always has a larger acceleration.

(b) No. Acceleration only tells how an object's velocity changes at some instant.

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Sumant
SumantLv10
14 Nov 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Two cars travel on the parallel lanes of a two-lane road. The cars' motions are represented by the position versus time graph shown in the figure. Answer the questions using the times from the graph indicated by letters.

(a) At which of the times do the two cars pass each other?

(b) Are the two cars traveling in the same direction when they pass each other?

A) yes

B) no

(c) At which of the lettered times, if any, does car #1 momentarily stop?

(d) At which of the lettered times, if any, does car #2 momentarily stop?

(e) At which of the lettered times are the cars moving with nearly identical velocity?

Two cars travel on the parallel lanes of a two-lane road. The car motions are represented by the position versus time graph shown in the figure. Answer the questions using g the times from the graph indicated by letters.

A) At which time do the two cars pass each other?

B) Are the two cars traveling in the same direction when they pass each other?

C) At which of the lettered times, if any, does car #1 momentarily stop?

D) At which of the lettered times, if any, does car #2 momentarily stop?

E) At which of the lettered times are the cars moving with nearly identical velocity?

 

 

1. Which of the following describes an object with a non-zero netforce acting on it? Choose all that apply.
The moped accelerated while making a left turn.
The motorcycle traveled at a constant speed while making au-turn.
The truck slowed down while making a right turn.
The spaceship traveled at a constant speed in a straightline.
The car sped up from 50 mph to 65 mph while moving in a straightline.

2. If you observe that an object is accelerating, what should youconclude?
A non-zero net force is acting on it. Only forces causeacceleration. As such, if an object is accelerating it must bebecause a non-zero net force is acting on it.
It must be in free fall.
It must be changing direction. Acceleration is a vector and vectorshave both magnitude and direction. Thus if an object isaccelerating it must be changing direction.
The forces acting on the object must be greater than the forces theobject is exerting.
It must be speeding up. If an object is accelerating that means itis speeding up.

3. Which of the following are true according to Newton's 2nd Law?Choose all that apply.

If the acceleration is zero, then the net force is zero.
If you apply the same force to 2 objects, the one with more masswill have a greater acceleration.
If you apply the same force to 2 objects, the one with less masswill have a greater acceleration.
If two objects have the same acceleration, the one with less masswill have a larger net force exerted on it.
If two objects have the same acceleration, the one with more masswill have a larger net force exerted on it.
The larger the net force on an object is, the larger theacceleration.
The larger the net force on an object is, the smaller theacceleration.

4. A box is on the Moon. The box weighs 152 lb and is in free fall.How much force is the box exerting on the Moon and in whatdirection?

lb
Up
Down
Right
North
East
West
Left
South

5. Which of the following are the correct units for mass? Chooseall that apply.
slugs
u
kg·m/s2
g
N
m/s2
oz
lb

6. If an object is traveling in a circle, which of the followingmust be TRUE? Choose all that apply.
The object is slowing down.
The object is speeding up.
The object has a net force acting on it.
The object has a constant velocity.
The object is accelerating.

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