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gladu [14]
3 years ago
12

Two racecars are driving at constant speeds around a circular track. both cars are the same distance away from the center of the

track, but car 2 is driving twice as fast as car 1. the acceleration of car 2 is ___________ the acceleration of car 1.
Physics
1 answer:
emmainna [20.7K]3 years ago
8 0
If the track has circumference c miles, then and the car's speeds are x and y mi/s, then since time = distance/speed, 

<span>In the same direction, the slow car has a "lead" of 1 mile which the faster car has to make up. </span>

<span>1/(y-x) = 120 </span>
<span>1/(x+y) = 30 </span>

<span>120(y-x) = 30(x+y) </span>
<span>120y-120x = 30x+30y </span>
<span>90y = 150x </span>
<span>y = 5/3 x </span>


<span>1/(x + 5/3 x) = 30 </span>
<span>8/3 x * 30 = 1 </span>
<span>80x = 1 </span>
<span>x = 1/80 mi/sec = 45 mph </span>
<span>y = 75 mph</span>
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A 0.095 kg tennis ball is traveling to the right at 40 m/s when it bounces of a wall and travels in the opposite direction it ca
Mashutka [201]

given that

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3 0
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Calculate the recoil speed of a 1.4 kg rifle shooting 0.006 kg bullets with muzzle speed of 800 m/a.3.43 m/s
Angelina_Jolie [31]

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p_i = 0

Instead the total momentum of the system after the shot is:

p_f = mv+MV

where:

m = 0.006 kg is the mass of the bullet

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v = 800 m/s is the velocity of the bullet

V is the recoil velocity of the rifle

The total momentum is conserved, therefore we can write:

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Solving for V, we can find the recoil velocity of the rifle:

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