Opaque magenta appears to be what color under yellow light?

A family car has a mass of 1400 kg. In an accident it hits a wall and goes from a speed of 27 m/s to a standstill in 1. 5 second

madreJ [45]

The force involved is = 25200 Newton

Given the values in the questions,

Mass = 1400 kg

Speed or velocity of the car = 27 m/s

Time is given = 1.5 seconds

According to the formula of force,

⇒ Force = Mass x Acceleration

⇒ Force = 1400 x Acceleration ----- equation 1

Now to calculate the value of acceleration we will use,

⇒ Acceleration = (Velocity or Speed) / Time

⇒ Acceleration = 27 / 1.5

⇒ Acceleration = 18 m/ $s^{2}$

Putting the value of acceleration in equation 1,

⇒ Force = 1400 x 18

⇒ Force = 25200 Newton

Therefore, the force involved is = 25200 Newton

To learn more about Force,

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8 0

2 years ago

What has to happen for a feather and ball to fall at the same time

Alex_Xolod [135]

This means that two objects will reach the ground at the same time if they are dropped simultaneously from the same height. ... When air resistance plays a role, the shape of the object becomes important. In air, a feather and a ball do not fall at the same rate.

4 0

4 years ago

How do simple machines make work easier? A. They add energy to the work. B. They change the strength or direction of a force. C.

WINSTONCH [101]

Your answer is A. They add energy to the work.

6 0

3 years ago

Read 2 more answers

You're investigating a subway accident in which a train derailed while rounding an unbanked curve of radius 150 m, and you're as

Ad libitum [116K]

Refer to the diagram shown below.

v = 35 km/h, the speed limit of the train
r = 150 m, the radius of the curve
ω = angular velocity
m = the mass of the strap
θ° = 15, the angle the strap makes with the vertical
T = tension in the strap

Note that
v = 35 km/h = 35*0.2778 m/s = 9.7223 m/s

The tangential velocity is v = rω, therefore the angular vcelocity is
ω = (9.7223 m/s)/(150 m) = 0.0648 rad/s

The centripetal force tending to make the train derail causes the strap to make an angle of 15 with the vertical.

Let θ = the maximum allowable angle at 35 km/h.
For horizontal equilibrium,
Tsin(θ) = mrω²
For vertical equilibrium,
Tcos(θ) = mg
Therefore
tan(θ) = (rω²)/g
= [(150 m)*(0.0648 rad/s)]/(9.8 m/s²)
= 0.0643
θ = tan⁻¹ 0.0643 = 3.7°

Because 15 > 3.7, we conclude that the train exceeded the 35 km/h speed limit when rounding the curve.

Answer: The train exceeded the 35 km/h speed limit.

8 0

3 years ago

A 15.0 kg sphere is at the origin and a 7.00 kg sphere is at x=20cm. At what position on the x-axis could you place a small mass

Zolol [24]

Answer:

The position of the small mass on the x- axis = 11.87 cm

Explanation:

From Newton's law of universal gravitation,

F₁ = Gm₁X/r₁² ................... Equation 1

Where F₁ = Force exerted on the on the small mass by the first sphere, m₁ = mass of the first sphere, X = mass of the small mass, r₁ = distance between the first sphere and the small mass.

Also,

F₂ = Gm₂X/r₂².................... Equation 2

Where F₂ = Force exerted by the second sphere on the small mass, m₂ = mass of the second sphere, X = mass of the small mass, r₂ = distance between the second sphere and the small mass.

Note: F₁ = F₂ ( Net force on the small mass due to the sphere is zero)

Therefore,

Gm₁X/r₁² = Gm₂X/r₂²

Equating the similar terms from both side of the equation,

m₁/r₁² = m₂/r₂².......................... Equation 3

Given: m₁ = 15.0 kg, m₂ = 7.00 kg, let r₁ = y cm, then r₂ = (20-y) cm

Substituting these values into equation 3

15/y² = 7/(20-y)²

15(20-y)² = 7y²

√{15(20-y)² = √7y²

√15×√(20-y)² = √7×√y² ( from the law of surd)

3.87(20-y) = 2.65y

77.4 - 3.87y = 2.65y

Collecting like terms and reordering the equation

2.65y+3.87y = 77.4

6.52y = 77.4

y = 77.4/6.52

y = 11.87 cm

Thus the position of the small mass on the x- axis = 11.87 cm

5 0

3 years ago