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
Nadya [2.5K]
4 years ago
8

Marcus drove from New York toward Chicago at a constant rate of 45 mph. Marie left New York 2 hr. later and drove the same route

at 55 mph. How long was Marcus driving before Marie caught up?
Physics
1 answer:
Kipish [7]4 years ago
8 0
<h2>Marcus was traveling 11 hours before Marie caught up.</h2>

Explanation:

Let the time of travel of Marcus before they caught up be t.

Time of travel of Marie = t - 2

Speed of Marcus = 45 mph

Speed of Marie = 55 mph

Distance traveled by them will be same.

Hence

Speed of Marcus x Time of travel of Marcus before they caught up= Speed of Marie x Time of travel of Marie before they caught up

          45 x t= 55 x (t-2)

          45t= 55 t - 110

           10 t = 110

               t = 11 hours

Marcus was traveling 11 hours before Marie caught up.

You might be interested in
A golf ball starts with a speed of 2 m/s and slows at a constant rate of 0.5 m/s2, what is its velocity after 2 s?​
jeka57 [31]

Answer:

3m/s

Explanation:

Given parameters:

Initial speed  = 2m/s

Acceleration  = 0.5m/s²

Time  = 2s

Unknown:

Final speed  = ?

Solution:

To solve this problem, we apply the right motion equation;

     V  = U + at

V is the final speed

U is the initial speed

a is the acceleration

t is the time

      V = 2  + (2 x 0.5)

      V = 2 + 1

      V = 3m/s

8 0
3 years ago
____________occurs when an object travels in a curved path.
labwork [276]

Answer:

Acceleration

Explanation:

can you mark me  brainlies

So, if an object travels in a curved path, it changes velocity, and, thus, accelerates. This acceleration must be tied to a force. ... Therefore, whenever an object travels in a curved path, there must be an unbalanced force acting upon it. It is important to understand that all this may occur without a change in speed.t

4 0
3 years ago
At what speed does a clock move if it is measured to run at a rate two-fifths the rate of a clock at rest with respect to an obs
Liono4ka [1.6K]

Answer:

0.44c

Explanation:

We know that

Time interval at speed (ts)= time interval at rest(tr) / gamma

where

gamma = √[1-(v/c)²]

ts = tr / gamma

tr/ts = gamma

But

Ss/Sr = gamma

Where

Sr = clock speed at rest, Ss at speed):

So

√[1-(v/c)²] = 2/5

1 - (v/c)² = 4/25

(v/c)²= 5/25

v/c = √5 / 5

v = 0.444c

4 0
3 years ago
A force of 8,480 N is applied to a cart to decelerate it at a rate of 32.0 m/s2. What is the mass of the cart?
GuDViN [60]
The realtionship between force in Newtons, mass in kilograms and acceleration in metres per second squared is described by Newton's second law of motion which is Force = mass times acceleration, or F=ma.  You need to know the mass, so rearrange the formula to solve for m, giving m=F/a
In your example, the mass is therefore  8480 divided by 32, which is equal to 265kg.
3 0
3 years ago
Read 2 more answers
The illustration in figure below shows a uniform metre rule weighing 30 N pivoted on a wedge placed under the 40 cm mark and car
stiv31 [10]

Answer:

W = 30 N

Explanation:

Applying the summation of torques about the wedge for equilibrium, taking the clockwise direction as negative. Since the ruler is balanced horizontally about the wedge. Therefore, the summation of all torques acting about the wedge must be equal to zero.

(70\ N)(40\ cm - 10\ cm)-(30\ N)(50\ cm-40\ cm)-(W)(100\ cm - 40\ cm) = 0\\W(60\ cm) = (70\ N)(30\ cm)-(30\ N)(10\ cm)\\\\W = \frac{1800\ N.cm}{60\ cm}

<u>W = 30 N</u>

3 0
3 years ago
Other questions:
  • A long solenoid has a length of 0.67 m and contains 1700 turns of wire. There is a current of 5.5 A in the wire. What is the mag
    9·1 answer
  • The body weighing 2 kg moves through the horizontal surface and crosses the path x = 75 cm The coefficient of friction of the bo
    11·1 answer
  • When a pendulum is at the position all the way to the left when it is swinging (at the top of the arc), what is true of the kine
    15·1 answer
  • A 75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high- efficiency moto
    5·1 answer
  • What is the change in height of a 0.50 kg object which lost 20 J of GPE?*
    15·1 answer
  • A car of mass 1600 kg traveling at 27.0 m/s is at the foot of a hill that rises vertically 135 m after travelling a distance of
    12·1 answer
  • Vector → A has a magnitude of 3.7 units, and vector → B has a magnitude of 11.5 units. If the value of → A ⋅ → B is 22.4 units s
    14·1 answer
  • Please, please, please help me!!!!!!
    9·1 answer
  • An object in the shape of a thin ring has radius a and mass M. A uniform sphere with mass m and radius R is placed with its cent
    6·1 answer
  • An elevator is being pulled up from the ground floor to the third floor by a cable. The cable is exerting 4500 newtons of force
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!