All categories

3 years ago

PLS HELP WILL MARK AS BRAINLIEST ANSWER

2 answers:

8 0

I’m pretty sure it’s 2 points, my brother is a high school basketball player and I’ve watched his games and he gets 2 points

Reika [66]3 years ago

6 0

Answer:

1 point?

Explanation:

You might be interested in

Compare and contrast four types <br> of friction

malfutka [58]

Some of these frictions depend on the Pressure, temperature of atmosphere.

Static Friction: This is the friction force when two objects in contact are not moving relative to each other. This friction is higher than kinetic friction.

Kinetic or Dynamic friction: this the friction force opposing the motion of objects, when two objects in contact are in motion relative to each other. It is less than the static friction. The two surfaces are rubbing against each other as they move.

Rolling friction: This is the friction when two objects are in contact and one object is rolling over the other - like a wheel on a road. The point of contact appears as stationary. The rolling friction is very less compared to static friction & dynamic friction.

Lubricated friction: this is the friction between two solid surfaces in contact with a layer of lubricant fluid flowing in between them. This friction is the least.

Fluid friction - viscosity : this is friction between two adjacent layers that are moving relative to each other at different speeds in a fluid. This is not high.

Internal friction: when an object is compressed and forced to deform, like in a piece of rubber, there is friction between the layers, that opposes this deformation.

Skin friction is the friction that opposes movement of a fluid across a solid surface. This is also called drag. When a coin is dropped in water, there is a friction called drag on the coin. Same is the case when a ball is thrown, a drag is experienced by the ball due to the drag of air.

6 0

3 years ago

A car goes around a curve of radius 60 m at a constant speed of 15 m/s. Which of the following values is the centripetal acceler

IRISSAK [1]

Answer:

3.75 m/s^2

Explanation:

The centripetal acceleration of an object in uniform circular motion is given by the equation:

$a=\frac{v^2}{r}$

where

v is the tangential speed of the object

r is the radius of the trajectory

In this problem, r = 60 m and v = 15 m/s, therefore the centripetal acceleration of the car is

$a=\frac{(15 m/s)^2}{60 m}=3.75 m/s^2$

4 0

3 years ago

You are unloading a refrigerator from a delivery van. The ramp on the van is 5.0 mm long, and its top end is 1.4 mm above the gr

Ivahew [28]

Answer:

Work done is 1.31 J.

Explanation:

Given:

Length of the ramp (L) = 5.0 mm

Height of the top end (H) = 1.4 mm

Horizontal force applied (F) = 270 N

Work done (W) = ?

We know that,

Work done is equal to the product of force and displacement caused along the line of application of force.

Here, the force acting on the refrigerator is in the horizontal direction while the refrigerator is moving down along the length of the ramp. So, we have to first find the horizontal component of the displacement caused.

Now, consider the triangle ABC representing the given situation. The point A is the top end point of the ramp, AB is the length of the ramp, AC is the vertical displacement of the refrigerator and BC is the horizontal displacement of the refrigerator.

Using Pythagoras theorem,

$AB^2=BC^2+AC^2\\\\(5.0)^2=BC^2+(1.4)^2\\\\BC=\sqrt{25.0-1.96}\\\\BC=4.86\ mm$

Now, force applied on the refrigerator is in the direction opposite to the horizontal component of displacement. So, work is negative.

Work = Force × Horizontal displacement

$W=270\ N\times 4.86\ mm\\\\W=1312.2\ \textrm{N-mm}\\\\W=1.31\ J\ \ \ \ \ \textrm{ [1 mm = 0.001 m]}$

Therefore, work done is 1.31 J.

7 0

3 years ago

What is the Energy Transformation of an electric radiant heater?

bagirrra123 [75]

Answer:

energy transfer electric to heat

8 0

3 years ago

By what factor would your weight change if the Earth's diameter were also doubled and its mass were quintupled?

Finger [1]

F=G*(M*m)/r^2

If you double the diameter, you double the radius. So this means r^2 is now (2*r)^2.

If you quintuple it's mass, you multiple M by 5. So M is now 5*M.

Now your equation is:

F=G*(5M*m)/(2r)^2

F= 5 G*(M*m)

------------------

4 r^2

so your answer is F (the force due to your mass and gravity or "weight") would change by a factor of 5/4!

F2= 5/4*F1 OR Weight (From New Earth) = 5/4*Weight(from old earth)

7 0

3 years ago