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
Lina20 [59]
3 years ago
13

You are in a car going 70 km/h and another car passes you going in the opposite direction at 70 km/h. Do both cars have the same

velocity? Explain.
Physics
2 answers:
telo118 [61]3 years ago
7 0
No, both the cars do not have the same velocity.

Velocity is a vector quantity and it is the rate of change of displacement with time or change in speed with direction.

Velocity has both magnitude and direction. So when you are in a car going 70 km/h and another car goes in the opposite direction at 70 km/h their velocities are different. 

How?

Consider your car as moving in the positive direction, so its velocity will be 70 km/h and for the car moving in the opposite direction, since the direction is opposite, the velocity of that car will be -70 km/h. This is because, the velocity is a vector quantity that has both magnitude and direction. For one car, the direction is positive and for the other one the direction is negative.
HACTEHA [7]3 years ago
4 0
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.

<span>The cars have different velocities. Their speeds are the same but their directions are different.</span>
You might be interested in
To initiate a nuclear reaction, an experimental nuclear physicist wants to shoot a proton into a 5.50-fm-diameter 12C nucleus. T
vladimir1956 [14]

Answer:

Explanation:

kinetic energy required = 1.80 MeV

= 1.8 x 10⁶ x 1.6 x 10⁻¹⁹ J

= 2.88 x 10⁻¹³ J

If v be the velocity of proton

1/2 x mass of proton x v² = 2.88 x 10⁻¹³

= .5 x 1.67 x 10⁻²⁷ x v² = 2.88 x 10⁻¹³

v² = 3.45 x 10¹⁴

v = 1.86 x 10⁷ m /s

If V be the potential difference required

V x e = kinetic energy . where e is charge on proton .

V x 1.6 x 10⁻¹⁹ = 2.88 x 10⁻¹³

V = 1.8 x 10⁶ volt .

3 0
3 years ago
Why are most objects not magnetic?
Vedmedyk [2.9K]
Because there’s like no metal stuff idk
6 0
3 years ago
Read 2 more answers
The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from 0 to 70 miles per hou
Inessa05 [86]

Answer:

a) 4.40 s

b) 2.20 s

Explanation:

Given parameters are:

At constant power  ,

initial speed of the car, v_0=0

final speed of the car, v=32 mph

At full power,

initial speed of the car, v_0=0

final speed of the car, v=64 mph

a)

At constant power, KE = \frac{1}{2} mv^2

At full power, KE = \frac{1}{2} m(2v)^2

So KE_f = 4KE_i

So, time to reach 64 mph speed is 4 times more than the initial time

t = 4*1.10 =4.40 s

b)

v=v_0+at\\a=\frac{v-v_0}{t}=\frac{32-0}{1.1/3600}=104727.27 miles/hours^2

For final 64 mph speed,

v=v_0+at\\t=\frac{v-v_0}{a}=\frac{64-0}{104727.27} = 6.111*10^{-4} hours = 6.111*10^{-4}*3600=2.20 s

7 0
3 years ago
A conveyer belt moves a 40 kg at a velocity of 2/ms what is the kinetic energy of the box while it is on the conveyor belt
CaHeK987 [17]
KE = (1/2)·(mass)·(speed)²

It doesn't matter whether the object is in a car, on a boat, 
falling, on a conveyor belt, or being carried by ants.

KE = (1/2)·(40 kg)·(2 m/s)²

KE = (20 kg)·(4 m²/s²)

KE = 80 kg-m²/s²

KE = 80 Joules
5 0
3 years ago
A playground merry-go-round has a mass of 120 kg and a radius of 1.80 m and it is rotating with an angular velocity of 0.600 rev
natulia [17]

Answer:

The final velocity \omega_f = 0.4235 \frac{rev}{s}

Explanation:

Given data

Mass of merry go round M_m = 120 kg

Radius = 1.8 m

Initial angular velocity \omega_i = 0.6 \frac{rev}{sec}

Mass of boy M_{boy} = 25 kg

We know that the final velocity is given by

\omega_f = \frac{\frac{1}{2}M_m \omega_i }{M_{boy} + \frac{1}{2} M_m }

Put all the values in above formula we get

\omega_f = \frac{\frac{1}{2}(120)  0.6}{25 + \frac{1}{2} (120) }

\omega_f = 0.4235 \frac{rev}{s}

This is the final velocity.

3 0
3 years ago
Other questions:
  • A motorcycle running on gasoline wastes a large amount of energy mainly as A) heat energy and sound energy. B) light energy and
    13·1 answer
  • A student throws a water balloon vertically downward from the top of a building. The balloon leaves the thrower's hand with a sp
    8·1 answer
  • Charlotte throws a paper airplane into the air, and it lands on the ground. Which best explains why this is an example of projec
    14·2 answers
  • The amount of energy absorbed by the substance and is generated by heat is called____________ energy. Matter or arrangement or t
    6·2 answers
  • What is the first stage of a thunderstorm?
    10·2 answers
  • Most earthquakes happen:
    10·2 answers
  • . If force (F), work (W) and velocity (v) are taken as fundamental quantities.
    8·2 answers
  • Record the lengths of the sides of ABC and ADE.
    9·1 answer
  • TEST: Circuit---2/25/21<br> All of the following apply to an electric current, except:
    7·1 answer
  • A spring stretches 2 meters when a 12 N force is acting on it. What is the spring constant (k)? 10 N/m 0.17 N/m 2 N/m 6 N/m
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!