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SpyIntel [72]
3 years ago
8

On a smooth horizontal floor, an object slides into a spring which is attached to another mass that is initially stationary. Whe

n the spring is most compressed, both objects are moving at the same speed. Ignoring friction, what is conserved during this interaction?
A) momentum and potential energy
B) kinetic energy only
C) momentum and kinetic energy
D) momentum onlyE) momentum and mechanical energy
Physics
1 answer:
saul85 [17]3 years ago
5 0

Answer: (E) Momentum and mechanical energy

Explanation:

 The momentum and the mechanical energy is basically conserved during the given interaction process as the forces on the given system are in the form of internal nature and then the momentum are get conserved.

According to the given question, on the smooth floor when an object are slides by using the spring then the momentum and the mechanical energy are conserved.

The mechanical energy is the combination of both the kinetic and the potential energy that is used for doing some amount of work. Therefore, Option (E) is correct answer.  

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A trolley has a mass of 1.2 kg and a speed of 4.5 m/s. The trolley crashes into a stationary trolley of mass 0.8 kg. On impact t
attashe74 [19]

(a) The momentum of the first trolley is 5.4 kgm/s

(b) The velocity of the trolleys after impact is 2.7m/s

<u>Explanation:</u>

Given:

Mass, m₁ = 1.2kg

Velocity, v₁ = 4.5m/s

Mass, m₂ = 0.8kg

v₂ = 0

(a) Momentum of the trolley before impact, p

We know:

Momentum = mass X velocity

p = 1.2 X 4.5

p = 5.4 kgm/s

Therefore, the momentum of the first trolley is 5.4 kgm/s

(b) Speed of the trolleys after impact, v = ?

During collision, the momentum is conserved.

So,

m₁v₁ + m₂v₂ = (m₁ + m₂)v

(1.2 X 4.5) + (0.8 X 0) = (1.2 +0.8) X v

5.4 + 0 = 2v

v = 2.7m/s

Therefore, the velocity of the trolleys after impact is 2.7m/s

8 0
4 years ago
a force of magnitude 30 n stretches a spring 0.83 m from equilibrium. what is the value of the spring constant?
hichkok12 [17]

Answer:

36 N/m

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5 0
3 years ago
A person in car slides to the right when going through a very sharp left turn on the highway. Is that law of inertia or law of a
inessss [21]

Answer:

Inertia :)

Explanation:

4 0
3 years ago
When waves of equal amplitude from two sources are in phase when they interact, it is called ________.?
8090 [49]
The answer is constructive interference. At the point when two waves meet such that their peaks line up together, then it's called productive obstruction. The subsequent wave has a higher adequacy. In dangerous obstruction, the peak of one wave meets the trough of another, and the outcome is a lower add up to adequacy.
3 0
3 years ago
A current of 5 A passes through a variable resistor set to 15 Ω. Calculate the voltage
OLEGan [10]

Answer:

75 volt

Explanation:

Current (I) = 5 A

Resistance (R) = 15 Ω

Voltage (V) = ?

We know

R = V/I

15 = v / 5

v = 75 Volt

3 0
3 years ago
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