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Leto [7]
3 years ago
14

Someone please help? :)

Physics
1 answer:
Gnoma [55]3 years ago
8 0

Answer:

(A) F_N - mg\cos\theta

Explanation:

The net force perpendicular to the surface of the incline is the sum of the gravity force component, which is mgcos(theta), and the reactionary normal force caused by the surface of the incline. The sum is F_N - mgcos(theta) and is usually 0 which is why the object is not moving perpendicularly to the surface of the incline.

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An electric device, which heats water by immersing a resistance wire in the water, generates 50 cal of heat per second when an e
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Answer:

0.69 ohm

Explanation:

Heat generated per second, H = 50 cal/s

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Let R is the resistance of coil.

The formula for the heat is given by

H = \frac{V^{2}}{R}t

50\times 4.186 = \frac{12^{2}}{R}\times 1

R = 0.69 ohm

3 0
3 years ago
How does kinect energy affect the stopping distance of a vehicle traveling at 30 mph compared to the same vehicle traveling at 6
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If it is the same vehicle, then the 60mph vehicle has more kinetic energy since it is moving faster. Therefore, it requires more energy to stop, and if it is the same car with the same beak system, the braking distance of the 30mph car will be significantly shorter than the 60mph car.



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3 years ago
A car with a mass of 3 Kg and velocity of 40 m/s collided with a truck of a velocity of 60 m/s, if the momentum is conserved wha
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m₁u₁ = m₂u₂

m₂ = (m₁u₁) / u₂

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Therefore, the mass of the truck is 2 kg.

4 0
3 years ago
The work of energy theorem states that an increase in net work results in what?
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