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3 years ago

•If the car and truck collided, which

Physics

1 answer:

viva [34]3 years ago

5 0

Answer:

The cars would both move in the direction with the greatest momentum. We know the truck would have the greatest momentum due to having the greatest mass. Plus, factors which affects momentum are mass and velocity.

Thus, the car would move forward towards the direction of momentum of the truck. Both will continue to move at the same velocity.

E.g. truck hits the back of a stationary car, both will move forward, to the right & travelling at the same speed, but lower than the initial velocity of the truck. Now the total the total momentum before the collision is the same as the total momentum after the collision; as a result, momentum has been conserved.

Hope this helps!

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A cube of side 0.2 m rests on the floor as shown.

andrey2020 [161]

Pressure= hqg
H=depth
q=density
g=gravity

h=0.2
q=7
g=10

0.2*7*10= 14pa

FINAL ANSWER = 14pa

4 0

2 years ago

A 5.50-kg object is hung from the bottom end of a vertical spring fastened to an overhead beam. The object is set into vertical

iris [78.8K]

Answer:

17.71N/m

Explanation:

The period of the spring is expressed according to the expression;

$T = 2 \pi \sqrt{\frac{m}{k} } \\$

m is the mass of the object

k is the force constant

Given

m = 5.50kg

T = 3.50s

Substitute into the formula;

$T = 2 \pi \sqrt{\frac{m}{k} } \\3.5 = 2 (3.14) \sqrt{\frac{5.5}{k} } \\3.5 = 6.28 \sqrt{\frac{5.5}{k} } \\\frac{3.5}{6.28} = \sqrt{\frac{5.5}{k} } \\0.557 = \sqrt{\frac{5.5}{k} } \\square \ both \ sides\\0.557^2 = (\sqrt{\frac{5.5}{k} })^2 \\0.3106 = \frac{5,5}{k}\\k = \frac{5.5}{0.3106}\\k = 17.71N/m$

Hence the force constant of the spring is 17.71N/m

4 0

3 years ago

A spring with a spring constant of 4 N/m is stretched by Sarah's dog until extended by 2 m. How much elastic potential energy is

azamat

Hi there!

Recall the equation for spring potential energy:

$PE = \frac{1}{2}kx^2$

k = Spring constant (N/m)

x = extension of spring from equilibrium (m)

PE = Potential Energy (J)

Plug in the given values:

$PE = \frac{1}{2}(4)(2^2) = \boxed{8 J}$

8 0

3 years ago

When nonmetals bond with other atoms, what usually happens?

Serga [27]

They share electrons because it is a covalent bond

7 0

3 years ago

Three resistors of equal resistance are connected in series as shown. Compared to the voltage provided by the battery, voltage a

dsp73

Answer:

the voltage across each resistor is one third of the battery voltage

Explanation:

In a series circuit, the current is constant throughout the circuit, so the battery voltage is equal to the sum of the voltage drop in each part of the series circuit.

V = i (R₁ + R₂ + R₃)

in the exercise indicate that all resistance has the same value

R₀ = R₁ = R₂ = R₃

V = i 3 R₀

V = 3 V₀

V₀ = i R₀

V₀= V / 3

the voltage across each resistor is one third of the battery voltage

6 0

3 years ago