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gizmo_the_mogwai [7]
3 years ago
11

Car 1 drives 20 mph to the south, and car 2 drives 30 mph to the north. From the frame of reference of car 1, what is the veloci

ty of car 2?
Physics
2 answers:
Aleksandr-060686 [28]3 years ago
5 0

Answer:

50 mph north

Explanation:

EleoNora [17]3 years ago
4 0
We subtract the velocity of car 1 from the velocity of car 2:
v=(30\ mph\ North)-(20\ mph\ South)
=(30\ mph\ North)+(20\ mph\ North)
=50\ mph\ North
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Beaker would be most appropriate for measuring the approximate volume of a liquid.
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KE = 1/2mv^2
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Q11) If you were standing at the top of a building and you dropped a rock.
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Answer:

Part A

The distance travel by the rock is approximately 132.496 m

Part B

The speed when the rock hits the ground is approximately 50.96 m/s

Explanation:

Part A

The question is focused on the kinetics equation of a free falling object

The given parameter is the time it takes the rock to hit the ground, t = 5.2 s

For an object in free fall, we have;

h = 1/2·g·t²

Where;

h = The height from which the object is dropped

g = The acceleration due to gravity ≈ 9.8 m/s²

t = The time taken to travel the distance, h = 5.2 s

∴ h = 1/2 × 9.8 m/s² × (5.2 s)² ≈ 132.496 m

The distance travel by the rock, h ≈ 132.496 m

Part B

The speed, 'v', when the rock hits the ground, is given by the following kinematic equation,

v = g·t

∴ v = 9.8 m/s² × 5.2 s = 50.96 m/s

The speed when the rock hits the ground, v ≈ 50.96 m/s.

8 0
2 years ago
Sketch a free body diagram for a hot air balloon which is rising off the ground. Indicate the magnitude of the force by utilizin
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Answer:

   F_net = B -W

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If we assume that the balloon rises at a constant speed

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The forces of action and reaction are the weight of the balloon that is the force of attraction of the Earth and the outside so the balloon pulls the earth that has an upward direction and is applied to the planet

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2 years ago
In the parallel circuit, is the current constant throughout the circuit, or does it vary?
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The current in a parallel circuits is not constant throughout the circuit. It varies in each path of a parallel circuit. The components that is place across each other have the same voltage in a parallel circuit. Remember, V=RI.
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