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Daniel [21]
3 years ago
6

How do speed and velocity differ

Physics
1 answer:
Elanso [62]3 years ago
4 0

Answer: Speed is a scalar

LVelocity is a vector quantity

Explanation: Scalar quantity such as speed only have magnitude in them. It only indicates the strength on how an object is moving. For velocity it is a vector quantity it both have magnitude and involves direction where the object is moving.

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State the term used to describe the turning force exerted by the man
ozzi

]A force called the effort force is applied at one point on the lever in order to move an object, known as the resistance force, located at some other point on the lever.

The way levers work is by multiplying the effort exerted by the user. Specifically, to lift and balance an object, the effort force the user applies multiplied by its distance to the fulcrum must equal the load force multiplied by its distance to the fulcrum. Consequently, the greater the distance between the effort force and the fulcrum, the heavier a load can be lifted with the same effort force.

8 0
2 years ago
A green block of mass m slides to the right on a frictionless floor and collides elastically with a red block of mass M which is
Charra [1.4K]

Answer:

M is equal to m

Explanation:

In case we say that the green block's mass m is less than red block's mass M, then the green block would have bounced and moved back to the left instead of coming to rest. The other case where if mass of green block's mass m would have been greater than the red block's mass M, the green block would have kept moving to the right instead of coming to rest. After collision, the red block moves to the right because of exchange of velocities. Therefore, m=M since m comes to rest and M moves to the right

In any collision, as it is asumed that no external forces can act during the collision, momentum must be conserved.

So, if we call p₁ to the momentum before collision, and p₂ to momentum after it, taking into account the information above, we can write the following:

p₁ = mv₁ + M.0 = p₂ = m.0 + Mv₂ ⇒ mv₁ = Mv₂

From the question, we also know that it was an elastic collision.

In elastic collision, added to the momentum conservation, it must be conserved the kinetic energy also.

So, if we call k₁ to the kinetic energy prior the collision, and k₂ to the one after it, we can write the following:

k₁ = 1/2 m(v₁)² + 1/2 M.0 = k₂ = 1/2m.0 + 1/2M(v₂)² ⇒ m(v₁)² = M(v₂)²

Mathematically, the only way in which both equations be true, should be with v₁ = v₂,  which is only possible if m=M too.

In this type of collision, it is said that the energy transfers from one mass to the other.

8 0
3 years ago
The temperature of a body is from 200 to 300C.The change of temp at absolute scale is
Oliga [24]

Answer:

mark me brainliest

Explanation:

The change of temperature at absolute scale is. A. 3.73 K

7 0
3 years ago
Read 2 more answers
10.
asambeis [7]

Answer: 590 MW

Water flows over a section of Niagara Falls at the rate of 1.2 × 106 kg/s and falls 50 m. How much power is generated by the falling water? = 5.9 × 108 W = 590 MW , where 'MW' represents megawatts.

Explanation:

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Where does the word 'robot' come from?
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It comes the word robota in czech meaning drudgery or hard labor
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