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Ray Of Light [21]
4 years ago
12

Some of three vectors which have same magnitude

Physics
1 answer:
stira [4]4 years ago
4 0
Depends on their directions. Could be anything from zero to triple the magnitude of each one.
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A boy throws a ball at a brick wall compare and contrast the force exerted by the ball into the wall and a force exerted by the
notka56 [123]
The ball is gonna bounce back duh
3 0
3 years ago
A Drive to the BeachMary drove from her home to the beach that is 30 mi from her house. The first 15 mi she drove at 60 mph, and
Allushta [10]

Answer:

Explanation:

Let us calculate the average velocity .

Average velocity = total distance / total time

Time taken to drive first 15 mi

= 15 / 60 = .25 h

Time taken to drive next 15 mi

= 15 / 30 = .5 h

Total time = .25 + .5 = .75 h

Total distance = 30 mi

average speed = 30 / .75

= 40 mi / h

So average speed is 40 mph which is less than given velocity of 45 mph .

Hence if she travels at 45 mph , she will take less time .

5 0
3 years ago
A uniform solid sphere has a moment of inertia I about an axis tangent to its surface. What is the moment of inertia of this sph
arsen [322]

Answer:

option E

Explanation:

given,

I is moment of inertia about an axis tangent to its surface.

moment of inertia about the center of mass

I_{CM} = \dfrac{2}{5}mR^2.....(1)

now, moment of inertia about tangent

I= \dfrac{2}{5}mR^2 + mR^2

I= \dfrac{7}{5}mR^2...........(2)

dividing equation (1)/(2)

\dfrac{I_{CM}}{I}= \dfrac{\dfrac{2}{5}mR^2}{\dfrac{7}{5}mR^2}

\dfrac{I_{CM}}{I}=\dfrac{2}{7}

I_{CM}=\dfrac{2}{7}I

the correct answer is option E

4 0
3 years ago
A screw incorporates which other simple machine?
Radda [10]

Answer:

Inclined plane.

Explanation:

Geometrically, a screw is a narrow inclined plane that is wrapped around a cylinder. Like the other simple machines a screw can amplify force; a small rotational force (torque) on the shaft can exert a large axial force on a load.

A screw is a cylinder with a head (solid top) at one end and a pointed tip (like a nail) at the other end.

The mechanical advantage of the screw depends on the space between the threads and the length (and thickness) of the screw. The closer the threads are, the greater the mechanical advantage. It is easier to drive a screw into an object if the thread spacing is smaller.

3 0
3 years ago
Read 2 more answers
Which pair of quantities represents scalar quantities
____ [38]

Answer:

physical quantity that only has magnitude and no other characteristics.

Explanation:

so no velocity only magnitude

6 0
3 years ago
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