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ruslelena [56]
3 years ago
9

What is a force field

Physics
1 answer:
amid [387]3 years ago
3 0
Chiefly in science fiction) an invisible barrier of exerted strength or impetus.
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On a frictionless horizontal air table, puck A (with mass 0.254 kg ) is moving toward puck B (with mass 0.367 kg ), which is ini
irinina [24]

Answer:

v_a=0.8176 m/s

\Delta K=0.07969 J - 0.0849 J = -0.00521 J

Explanation:

According to the law of conservation of linear momentum, the total momentum of both pucks won't be changed regardless of their interaction if no external forces are acting on the system.

Being m_a and m_b the masses of pucks a and b respectively, the initial momentum of the system is

M_1=m_av_a+m_bv_b

Since b is initially at rest

M_1=m_av_a

After the collision and being v'_a and v'_b the respective velocities, the total momentum is

M_2=m_av'_a+m_bv'_b

Both momentums are equal, thus

m_av_a=m_av'_a+m_bv'_b

Solving for v_a

v_a=\frac{m_av'_a+m_bv'_b}{m_a}

v_a=\frac{0.254Kg\times (-0.123 m/s)+0.367Kg (0.651m/s)}{0.254Kg}

v_a=0.8176 m/s

The initial kinetic energy can be found as (provided puck b is at rest)

K_1=\frac{1}{2}m_av_a^2

K_1=\frac{1}{2}(0.254Kg) (0.8176m/s)^2=0.0849 J

The final kinetic energy is

K_2=\frac{1}{2}m_av_a'^2+\frac{1}{2}m_bv_b'^2

K_2=\frac{1}{2}0.254Kg (-0.123m/s)^2+\frac{1}{2}0.367Kg (0.651m/s)^2=0.07969 J

The change of kinetic energy is

\Delta K=0.07969 J - 0.0849 J = -0.00521 J

3 0
3 years ago
There are 5,280 feet in 1 mile and 12 inches in one foot. How many inches are in a mile?
ohaa [14]
63360
5280 feet*12 inches in every foot=63360
4 0
3 years ago
A statue of a great baseball player weighs 2400 N and has a base that is 4 m x 2 m. What is the pressure the statue exerts on th
bulgar [2K]

Answer:

300N/m²

Explanation:

Pressure is calculated using the formula;

Pressure = Force/Area

Given

Force = 2400N

Area = 4m×2m = 8m²

Substitute the given parameters into the formula as shown;

Pressure = 2400/8

Pressure = 300N/m²

Hence the pressure the statue exerts on the floor is 300N/m²

5 0
3 years ago
HELP ASAP
velikii [3]

Answer:

A. negatively charged are deposited on the belt, which deposits positive charges on the metal ball.

Explanation:

Negatively charged ions are injected at one end of thebelt towards the high potntial terminal, where they are acclerated by attractive forces towards the terminal. When the particles reach the terminal, they are stripped of some electrons to make them positively charged.

5 0
3 years ago
An airplane travels 4000 in 16 seconds on a heading of 35 degrees. what is its velocity,
galben [10]

Its velocity is  250 per second in the direction of 35 degrees.

3 0
4 years ago
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