What is the net force acting on a 0.15 hockey puck accelerating at 12 m/s/s?

Physics

1 answer:

svetoff [14.1K]3 years ago

3 0

1.8N

Explanation:

Given parameters:

Mass of the hockey puck = 0.15kg

Acceleration = 12m/s²

Unknown:

Net force = ?

Solution:

According newton's second law of motion "the net force on a body is the product of its mass and acceleration".

Force = mass x acceleration

Input the variables;

Net force = 0.15 x 12 = 1.8N

learn more:

Newton's law of motion brainly.com/question/11411375

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The driver of a car traveling at 22.8 m/s applies the brakes and undergoes a constant deceleration of 2.95 m/s 2 . How many revo

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Answer:

70 revolutions

Explanation:

We can start by the time it takes for the driver to come from 22.8m/s to full rest:

$t = \Delta v/a = (22.8 - 0)/2.95 = 7.73 s$

The tire angular velocity before stopping is:

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Also its angular decceleration:

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Using the following equation motion we can findout the angle it makes during the deceleration:

$\omega^2 - \omega_0^2 = 2\alpha\Delta \theta$

where $\omega$ = 0 m/s is the final angular velocity of the car when it stops, $\omega_0$ = 114rad/s is the initial angular velocity of the car $\alpha$ = 14.75 rad/s2 is the deceleration of the can, and $\Delta \theta$ is the angular distance traveled, which we care looking for: