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timofeeve [1]
3 years ago
15

Consider the video demonstration that you just watched. A more complete explanation of what you saw will be possible after cover

ing Newton's laws. For now, consider the following question: How would the result of this experiment change if we replaced the ball with another one that had half the mass
Physics
1 answer:
Paul [167]3 years ago
3 0

Answer:

The second law is given by

F = m a

Explanation:

Newton's second law is the real law.

It shows that the force acting on the object is directly proportional to the rate of change of momentum of the body.

F = m (v - u) / t

F = m a

where, m is the mass of the body, a is the acceleration, v is the final velocity and u is the initial velocity.

If the mass is halved and to keep the force same the acceleration is doubled.

You might be interested in
You are pushing a 20-kg box along a horizontal floor. Friction acts on the box. When you apply a horizontal force of magnitude 4
LenKa [72]

Answer:

a = 2.6\,\frac{m}{s^{2}}

Explanation:

The first box has the following equation of equilibrium:

\Sigma F = F - f = 0

f = F

f = 48\,N

The coefficient of friction is:

\mu_{k} = \frac{f}{m \cdot g}

\mu_{k} = \frac{48\,N}{(20\,kg)\cdot (9.807\,\frac{m}{s^{2}} )}

\mu_{k} = 0.245

There is a net acceleration, when horizontal pushing force is increased:

\Sigma F = F - f = m\cdot a

a = \frac{F-f}{m}

a = \frac{100\,N-48\,N}{20\,kg}

a = 2.6\,\frac{m}{s^{2}}

7 0
3 years ago
Read 2 more answers
What distance does electromagnetic radiation travel in 45.0 μs ?
SpyIntel [72]

The speed of light (electromagnetic radiation) is equal to 299 792 458 m / s or 3x10^8 m/s in scientific notation.

So with this information, we could now look for the distance. Solution:

Take note that μs means microseconds.

Speed of light * microseconds travelled * actual amount of microseconds
(3x10^8 m/s) (45.0 μs) (1x10^-6 s/μs) = 13,500 m.

3 0
3 years ago
A car travels 210 miles in t hours at a speed of r mph. if the car travels half as fast but five times as long, how far does it
Kobotan [32]
The car travls 400mph

7 0
3 years ago
El valor más preciso de la masa de un electron es 9.11*10^-11kg ¿ Cuánto aumentaría la masa de un cuerpo que se carga con -1 c d
chubhunter [2.5K]

Answer:

m = 569.375\times 10^{6}\,kg

Explanation:

Un electrón tiene una carga negativa de 1.6\times 10^{-19}\,C y la masa total es igual al producto del número de electrones y esa carga unitaria. El número de electrones se obtiene al dividir la carga total por la carga unitaria. (An electron has a negative charge of 1.6\times 10^{-19}\,C and the total mass is equal to the product of the qunatity of electrons and such unit charge. The quantity of electrons is found by diving the total charge by the unit charge):

m = \frac{Q}{q} \cdot m_{e}

m = \left(\frac{1\,C}{1.6\times 10^{-19}\,C} \right)\cdot (9.11\times 10^{-11}\,kg)

m = 569.375\times 10^{6}\,kg

7 0
4 years ago
Bob weighs 80 pounds. He ran up the steps which rose 14 feet. Fred weighs 110 pounds. He ran up the same steps as Bob. If both b
pav-90 [236]
Bob gained (80lbs x 14ft) = 1120 ft-lbs of energy.

Fred gained (110lbs x 14ft) = 1540 ft-lbs of energy

Since they both took the same amount of time, Fred's power (rate
of doing work) was greater than Bob's power (rate of doing work).
6 0
3 years ago
Read 2 more answers
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