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LenaWriter [7]
4 years ago
8

Suppose a cart is being moved by a certain net force. If a load is added to the cart so its mass is doubled, what is the ratio o

f the new acceleration to the old acceleration? 1. 4 2. 2 3. 0.625 4. 3 5. 1 6. 0.333 7. 0.25 8. 0.2 9. 0.5 10. 1.5
Physics
1 answer:
Irina-Kira [14]4 years ago
4 0

Answer:

The correct answer is 9

Explanation:

Newton's second law states that force is proportional to the product of mass by acceleration

F = ma

With the first condition

F = m a1

We double the mass

F = 2m a2

.ma1 = 2 m a2

.a2 / ai = 0.5

The correct answer is 9

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At Alpha Centauri's surface, the gravitational force between Alpha Centauri and a 2 kg mass of hot gas has a magnitude of 618.2
sergeinik [125]

Answer:

6.86 * 10^8 m

Explanation:

Parameters given:

Mass of hot gas, m = 2 kg

Gravitational Force, F = 618.2 N

Mass of Alpha Centauri, M = 2.178 * 10^30 kg

The gravitational force between two masses (the hot gas and Alpha Centauri) , m and M, at a distance, r, given as:

F = (G*M*m) / r²

Where G = gravitational constant

Therefore,

618.2 = (6.67 * 10^(-11) * 2.178 * 10^30 * 2) / r²

=> r² = (6.67 * 10^(-11) * 2.178 * 10^30 * 2) / 618.2

r² = 4.699 * 10^17 m²

=> r = 6.86 * 10^8 m

We are told that the hot gas is on the surface of Alpha Centauri, hence, the distance between both their centers is the radius of Alpha Centauri.

The mean radius of Alpha Centauri is 6.86 * 10^8 m.

5 0
3 years ago
Read 2 more answers
How do you find the valume for a cylinder
ss7ja [257]

here is the answer Calculate the area of the base (which is a circle) by using the equation πr² where r is the radius of the circle. Then, multiply the area of the base by the height of the cylinder to find the volume.

3 0
3 years ago
SIL. TUILE I JUMU<br>Write down your own examples for each of the different effects of forces.​
Harrizon [31]

Answer:

magnetic force

Explanation:

when some one gets charged up by maybe static eletricity the person will sustain the energy and the energy will make a force field around the person which can and will attract paper and he will be attractive

5 0
3 years ago
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When an 8-V battery is connected to a resistor, 2 A of current flows in the resistor. What is the resistor's value? A. 2 ohms B.
SVEN [57.7K]
Its B 4ohM
As v =I /R
R=V/I
6 0
4 years ago
A free falling object has the velocity time graph shown. What is the objects displacement between 0.0 and 6.0s
zloy xaker [14]

For free fall motion the displacement can be found by graphically as well as by kinematics equation

Here acceleration of object is constant as it fall due to gravity so we can use

d = v_i * t + \frac{1}{2}at^2

here if body starts with zero initial speed then we can say

d = 0 + \frac{1}{2}*9.8*t^2

here we need to find the displacement from t = 0 to t = 6s

so we can say

d = \frac{1}{2}*9.8*6^2

d = 176.4 m

so the displacement will be 176.4 m

in order to find the displacement from the graph of velocity and time we need to find the area under the graph for given time interval that will also give us same displacement for given period of time.

6 0
4 years ago
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