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
ivanzaharov [21]
2 years ago
14

A 1.5-kilogram cart initially moves at 2.0 meters per second. It is brought to rest by a constant net force in 0.30 second. What

is the magnitude of the net force?
Physics
1 answer:
AnnZ [28]2 years ago
6 0
Acceleration = (change in speed) / (time for the change)

Change in speed = (speed at the end) minus (speed at the beginning.

The cart's acceleration is

                               (0 - 2 m/s) / (0.3 sec)

                           = ( -2 / 0.3 ) (m/s²)  =  -(6 and 2/3) m/s² .

Newton's second law of motion says

                             Force = (mass) x (acceleration) .

For this cart:      Force = (1.5 kg) x ( - 6-2/3 m/s²)

                                       = ( - 1.5 x 20/3 ) (kg-m/s²)

<span>                                       =      </span>- 10 newtons .

<span>The force is negative because it acts opposite to the direction </span>
<span>in which the cart is moving, it causes a negative acceleration, </span>
<span>and it eventually stops the cart.</span>
You might be interested in
A car (mass = 1200 kg) is traveling at 31.1 m/s when it collides head-on with a sport utility vehicle (mass = 2830 kg) traveling
IrinaVladis [17]

Answer:

13.18 m/s

Explanation:

Let the velocity of sports utility car is

-u as it is moving in opposite direction.

mc = 1200 kg, uc = 31.1 m/s

ms = 2830 kg, us = - u = ?

Using conservation of momentum

mc × uc + ms × us = 0

1200 × 31.1 - 2830 × u = 0

u = 13.18 m/s

4 0
3 years ago
"Without forces there can be no movement"- Do you agree with this statement? Why or Why not?​
myrzilka [38]

Answer: Yes.

Explanation: It is clearly stated in Newton’s first law of physics that an object will not change its motion unless a force acts on.

6 0
3 years ago
You are retrieving your boat from the water. as a courtesy to others, when should you pull your boat into a launch lane?
OLga [1]
The best way to pull the boat in the launch lane is when the towing vehicle has reached the boat ramp as well as the trailer. It is best to retrieve the boat in this manner for it is more appropriate, convenient and it is a way of showing courtesy towards others because it is a proper manner.
7 0
3 years ago
Read 2 more answers
if the current in a wire is 2.0 amperes and the potential difference across the wire is 10 volts what is the resistance of the w
Pavlova-9 [17]

Answer:

R = 2Ω

Explanation:

Potential difference (V) = current (I) * Resistance (R)

V = IR

I = 2.0A

V = 10v

R = ?

V = IR

R = V / I

R = 10 / 2

R = 2Ω

The resistance across the wire is 2Ω

3 0
3 years ago
Read 2 more answers
two clear, colorless liquids are poured together. A bright yellow solid forms. What physical properties have changed?
jek_recluse [69]
Change in state(from liquid to solid) and change in colour I believe.
3 0
3 years ago
Other questions:
  • Help with Physical Science! I have to do this discussion on potential and kinetic energy. The example of the problem is a 4 poun
    6·1 answer
  • A water wave has a frequency of 2 hertz and a wavelength fo 5 meters. Calculate is speed
    7·1 answer
  • Suppose two waves collide, and the temporary combined wave that results is smaller than the original waves. what term best descr
    14·1 answer
  • When water (H2O) freezes into ice, some of the properties have changed. What stays the same?
    13·1 answer
  • Why does a small pebble sin in water?
    7·1 answer
  • After the box comes to rest at position x1, a person starts pushing the box, giving it a speed v1. When the box reaches position
    11·1 answer
  • An object has a mass of 20 grams and a volume of 5 cubic centimeters what is the object density
    12·1 answer
  • A car of mass 2 320 kg is descending a sloping road, inclined at 10.0° to the horizontal. The driver sees a hazard and brakes to
    10·1 answer
  • Some runners train with parachutes that trail behind them to provide a large drag force. These parachutes are designed to have a
    8·1 answer
  • Describe the relationship between atoms and elements,molecules, and compounds.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!