3 years ago

If you double the velocity of an object, you increase its kinetic energy by a factor of what ?

1 answer:

Ivan3 years ago

3 0

Energy is proportional to the square of the velocity. So if you double the velocity you increase the Kinetic Energy by a factor of four

You might be interested in

A 250 mL sample of nitrogen(N2) has a pressure of 745 mm Hg at 30 C.What is the mass of nitrogen?

Lera25 [3.4K]

We assume that nitrogen gas sample here is an ideal gas. So that, we can use the ideal gas equation which is expressed as follows:

PV = nRT

First, we calculate the number of moles from the equation above. Then, use molar mass to calculate mass.

n = PV/RT
n = (745/760) (0.250) / 0.08206 (30+273.15)
n = 0.01 mol

m = 0.01 ( 28) = 0.28 g

3 0

3 years ago

A shunting engine in a rail yard is working on a straight east-west section of line. First it travels west for 150 s with an ave

Ymorist [56]

Displacement-1

$\\ \rm\longmapsto Velocity(Time)$

$\\ \rm\longmapsto 150(4)$

$\\ \rm\longmapsto 600m$

Displcaement-2

$\\ \rm\longmapsto 200(3)$

$\\ \rm\longmapsto 600m$

Total displacement=600+600=1200m

7 0

3 years ago

Read 2 more answers

a 2000kg car initially traveling at a speed of 15 m/s is accelerated by a constant force of 10000 n for 3 seconds. the new speed

Juliette [100K]

Mass of the car (m) = 2000 Kg
Initial velocity (u) = 15 m/s
Force (F) = 10000 N
Time (t) = 3 s
Let the acceleration be a.
By using the formula, F = ma, we get,
10000 N = 2000 Kg × a
or, a = 10000 N ÷ 2000 Kg
or, a = 5 m/s^2
Let the final velocity be v.
By using the formula, v = u + at, we get,
v = 15 m/s + 5 m/s^2 × 3 s
or, v = 15 m/s + 15 m/s
or, v = 30 m/s

Answer:

The new speed of the car is 30 m/s.

Hope you could get an idea from here.

Doubt clarification - use comment section.

8 0

3 years ago

You have a horizontal cathode ray tube (CRT) for which the controls have been adjusted such that the electron beam should make a

Dvinal [7]

Answer:

Explanation:

Rotate it slowly to establish whether the spot moves. If it is broken, it will stay as it is. By rotating it the electrons' path to the centre of the screen will be tilted to another position by any external disturbing field.

8 0

3 years ago

Exercise will not help maintain the health of your endocrine system.

Mashcka [7]

A. True

Hope this helps :)

6 0

2 years ago