All categories

3 years ago

Which statement best compares momentum and kinetic energy?

Physics

2 answers:

Ivahew [28]3 years ago

8 0

Answer:

B. Momentum is a vector quantity and kinetic energy is a scalar quantity.

Explanation:

A scalar quantity has just magnitude. A vector quantity has both magnitude and direction.

Momentum is the product of mass and velocity.

P = m v

It is a vector quantity. It depends on magnitude as well as direction.

Energy possessed by a body due to virtue of its motion is known as kinetic energy. It is a scalar quantity.

E = 0.5 mv²

Thus, the correct option is A.

Masteriza [31]3 years ago

3 0

The answer on the question given is letter B.Momentum is a vector quantity and kinetic energy is a scalar quantity.

You might be interested in

In your own words, explain what conservation of energy means. Also, give an example of the conservation of energy using somethin

Genrish500 [490]

Energy can not be created or destroyed but can change from one form to another.

example: as a roller coaster cart loses height the more speed it gains, the potential energy is transferred into kenetic energy

8 0

3 years ago

A small 12.00 g plastic ball is suspended by a string in a uniform, horizontal electric field. If the ball is in equilibrium whe

notsponge [240]

Answer:

$Q = \frac{0.068}{E}$

where E = electric field intensity

Explanation:

As we know that plastic ball is suspended by a string which makes 30 degree angle with the vertical

So here force due to electrostatic force on the charged ball is in horizontal direction along the direction of electric field

while weight of the ball is vertically downwards

so here we have

$QE = F_x$

$mg = F_y$

since string makes 30 degree angle with the vertical so we will have

$tan\theta = \frac{F_x}{F_y}$

$tan30 = \frac{QE}{mg}$

$Q = \frac{mg}{E}tan30$

$Q = \frac{0.012\times 9.81}{E} tan30$

$Q = \frac{0.068}{E}$

where E = electric field intensity

5 0

3 years ago

B. Jerome plays middle linebacker for South's varsity football team. In a game against

weqwewe [10]

Answer:

Option D

670 Kg.m/s

Explanation:

Initial momentum is given by mv=82*5.6=459.2 Kg.m/s (taking eastward as positive)

Final momentum is also mv but v being westward direction, we take it negative

Final momentum=82*-2.5= -205 Kg.m/s

Change in momentum=Final momentum-Initial momentum=-205-459.2=-664.2 Kg.m/s

Impulse=change in momentum=664.2 Kg.m/s rounded off as 670 Kg.m/s

4 0

3 years ago

A bowling sphere is sitting on the ground. One of your classmates

ikadub [295]

normal force because it is perpendicular to the surface

4 0

3 years ago

A 50 N object is on Earth. What is its mass?

faust18 [17]

Answer: 5.10 KG

Explanation: W = 50 N

BY FORMULA

W = MG

M = W/G

M = 50 /9.8

M= 5.10 KG

7 0

2 years ago