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
Katyanochek1 [597]
3 years ago
8

Suppose an empty grocery cart rolls downhill in a parking lot. The cart has a maximum speed of 1.3 m/s when it hits the side of

the store and comes to rest 0.30 s later. If an unbalanced force of —65 N stops the cart, what is the mass of the grocery cart?
Physics
1 answer:
Ket [755]3 years ago
4 0

The cart comes to rest from 1.3 m/s in a matter of 0.30 s, so it undergoes an acceleration <em>a</em> of

<em>a</em> = (0 - 1.3 m/s) / (0.30 s)

<em>a</em> ≈ -4.33 m/s²

This acceleration is applied by a force of -65 N, i.e. a force of 65 N that opposes the cart's motion downhill. So the cart has a mass <em>m</em> such that

-65 N = <em>m</em> (-4.33 m/s²)

<em>m</em> = 15 kg

You might be interested in
Of the three primary forms of subaerial volcanoes, ________ are large cone-shaped mountains that consist of alternating layers o
Alborosie

Answer:

Strato-volcano

Explanation:

Strato-volcanoes are usually characterized by the presence of steep-sided slopes, with distinct craters, and are frequently erupted and conical in appearance. This type of volcano is generally felsic in nature. Due to the presence of high silica content, the magma being highly viscous, moves at a relatively slower rate. These are highly explosive and produce a large number of pyroclastic materials, lava flow, volcanic ashes, and gases.

They are also commonly considered as the composite volcano, and are comprised of alternating tephra and solidified lava layers.

5 0
3 years ago
A jet of water of cross section area and velocity v impinges normally on a stationary flat plate the mass per unit volume of wat
Sergio039 [100]
<h2>F = kAρv²</h2>

Explained in the attachment !

<h3>Hope it helps you!!</h3>

4 0
2 years ago
Two footballs (A &amp; B) are thrown with the same amount of force. Football A has a greater mass. Describe the acceleration for
Sauron [17]
Newton's second law gives the relationship between force applied to an object, its mass and its acceleration:
F=ma
where F is the force, m the mass and a the acceleration.

A force F is applied to football A, whose mass is m_A, and so the acceleration of this football will be given by (re-arranging the previous equation)
a_A =  \frac{F}{m_A}

Similarly, the acceleration of football B will be
a_B= \frac{F}{m_B}
where m_B is the mass of football B, and where the force F applied to the two footballs is the same.

Since football A has greater mass than football B, m_A \ \textgreater \  m_B, if we compare the two previous formula we see that the acceleration of football B is greater than the acceleration of football A:
a_B \ \textgreater \  a_A
Therefore, if the same force is applied to the two footballs, football B will accelerate more than football A.
8 0
3 years ago
fossil fuels are formed by the decomposition of dead plants and animals. which flow chart describes the correct energy transform
umka2103 [35]
Chemical to kinetic +( heat + sound)

The energy formations in brackets are wasted and passed on to their surroundings.

Hope this helps! :)
8 0
3 years ago
How is a physical change different from a chemical change
lorasvet [3.4K]
There's a few differences. In a physical change the actual substance doesn't change, where in a chemical change with chemical reaction, a new substance is formed. Physical change can be reversed, and chemical change can't.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following statements best describes the definition of<br> distance?
    15·1 answer
  • Heat transfer within a fluid takes place by
    14·2 answers
  • What is the si unit of force ​
    7·2 answers
  • Given that mH = 1.007825 u, is the mass of a hydrogen atom 1H greater than, less than, or equal to 1/12 the mass of a 12C atom?
    14·1 answer
  • A Ferris wheel at a carnival has a diameter of 58 feet. Suppose a passenger is traveling at 9 miles per hour. (A useful fact: .)
    15·1 answer
  • An object has 100 J of kinetic energy and a mass of 2 g. How fast was it traveling? 
    11·1 answer
  • During the new moon phase, why is the Moon not visible in the sky?
    7·1 answer
  • A longer growing season is a result of _______.
    11·2 answers
  • The masses of four vehicles and the net forces acting on them as they enter a highway are recorded in the table below. Vehicles
    7·1 answer
  • 86. What is the average velocity if the initial velocity is at rest and the final velocity of 16 m/s? a) 16 m/s b) 12 m/s c) 8 m
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!