A 2.9-kg cart is rolling along a frictionless, horizontal track towards a 1.4-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain instant before the carts collide, the first cart's velocity is +3.9 m/s, and the second cart's velocity is -1.2 m/s. (a) What is the total momentum of the system of the two carts at this instant? (b) What was the velocity of the first cart when the second cart was still at rest?
Answers
Answer:
9.63 kg m/s
3.32 m/s
Explanation:
= Mass of first cart = 2.9 kg
= Mass of second cart = 1.4 kg
= Velocity of first cart = 3.9 m/s
= Velocity of second cart = -1.2 m/s
Total momentum of the system
The total momentum of the system is 9.63 kg m/s
Equating the same equation with
The velocity of the first cart when the second cart was still at rest is 3.32 m/s
Related Questions
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What is transferred by a force moving an object through a distance? A. force B. mass C. motion D. energy
A rock is dropped off a cliff and falls the first half of the distance to the ground in t1 seconds. If it falls the second half of the distance in t2 seconds, what is the value of t2/t1? (Ignore air resistance.)
What is the product of nuclear fission?a. two different atoms that are isotopes of the original atom b. two different atoms that are both less massive than the original atom c. two different atoms that have larger electron clouds than the original atom d. two different atoms that have the same number of neutrons as the original atom User: What is released when the nuclei of two smaller atoms fuse to form a larger atom? a. energy b. compound c. mass d. matter
B. a liquid.
C. a gas.
D. both b and c
Answers
Answer:
Solids
Explanation:
Solids have definite shapes and definite volumes. The forces of attraction between the molecules of a solid substance are strong and the intermolecular spaces are very small. Due to this, the motion of molecules within a solid substance are very difficult that they only vibrate in their positions.
For liquids, they have definite volumes and indefinite shapes. The forces of attraction between the molecules of a liquid are intermediate and the the intermolecular spaces are intermediate as well. Due to this, the motion of molecules within a liquid substance is not as difficult as it is within solids.
Finally, for gases, they have indefinite shapes and indefinite volumes. The forces of attraction between the molecules of a gas are weak and the intermolecular spaces are large. Due to this, the motion of particles of gas is very easy.
Hope this helps :)
Final answer:
The forces of attraction limit the motion of particles most significantly in solids because particles in a solid are closely packed and have stronger forces of attraction, which hold them tightly in fixed positions.
Explanation:
The forces of attraction between particles limit motion most significantly in a solid (Option A). In a solid, particles are closely packed together and have the least amount of freedom to move, compared to particles in a liquid or gas. This is because the forces of attraction in a solid are very strong, holding particles tightly in fixed positions. In contrast, particles in liquids and gases have more freedom to move as the forces of attraction are weaker.
However, this does not mean that particles in a liquid or gas do not experience forces of attraction. They do, but the forces are weaker in comparison to solids, allowing for more movement. Hence, solids are the state of matter in which forces of attraction limit the motion of particles most.
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(b) g/cm
(c) g/cm3
(d) L/kg
Answers
Answer:
g/ml
Explanation:
Answers
Answer:
The amount of energy added to rise the temperature Q = 17413.76 KJ
Explanation:
Mass of water = 52 kg
Initial temperature = 68 °F = 20° c
Final temperature = 212 °F = 100° c
Specific heat of water
Now heat transfer Q = m × C × ( -
)
⇒ Q = 52 × 4.186 × ( 100 - 20 )
⇒ Q = 17413.76 KJ
This is the amount of energy added to rise the temperature.
Answers
It will take a car, 2.59 s to accelerate from 15.2 to 23.5 m/s.
What is Speed?
speed is described as. the pace at which an object's location changes in any direction. Speed is defined as the distance traveled divided by the travel time. Speed is a scalar quantity because it just has a direction and no magnitude.
Given, the car has an average acceleration of 3.2 m/s².
To solve this problem, we can use the following kinematic equation:
v = u +at
where:
v is the final velocity (23.5 m/s)
u is the initial velocity (15.2 m/s)
a is the acceleration (3.2 m/s^2)
t is the time
We can rearrange this equation to solve for t:
t = (v -u)/a
substituting the values we have:
t = (23.5 - 15.2 ) / 3.2
t = 2.59375 seconds
Therefore, it will take approximately 2.59 seconds for the car to accelerate from 15.2 m/s to 23.5 m/s with an average acceleration of 3.2 m/s².
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Hello!
How long will it take a car to accelerate from 15.2 m/s to 23.5 m/s if the car has an average acceleration of 3.2 m/s² ?
We have the following data:
Vf (final velocity) = 23.5 m/s
Vi (initial velocity) = 15.2 m/s
ΔV (speed interval) = Vf - Vi → ΔV = 23.5 - 15.2 → ΔV = 8.3 m/s
ΔT (time interval) = ? (in s)
a (average acceleration) = 3.2 m/s²
Formula:
Solving:
Answer:
The car will take approximately 2.6 seconds to accelerate
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I Hope this helps, greetings ... Dexteright02! =)
Answers
Formula:
MA = L / H
Since we already have the mechanical advantage and length, this time we need to find the height .
MA 5 = 10 / h
h = 10 / 5
h = 2 meters
Therefore, the ramp has a length of 10 meters, a height of 2 meters with a mechanical advantage of 5.
Answer:
height=2
Explanation:
MA= input/output
MA= 5
input = 10 (the ramp)
output=x (the height)
5=10/x
x=2
Answers
Let's figure it out.
The charge on one electron is 1.60 x 10⁻¹⁹ Coulomb .
To get 3,500 Coulombs of charge, you'd need to
go around and collect
(3,500) / (1.60 x 10⁻¹⁹) electrons.
That's 2.19 x 10²² of the little fellas.
That's a big number. But what's REALLY amazing is the
mass and weight of that many electrons:
Mass: 1.989 x 10⁻⁵ gram
Weight: about 0.0000007 ounce !
That's not one electron. That's the whole 2.19 x 10²² uvvum
that it takes to hold 3,500 Coulombs of charge.