Can anyone answer any of these questions with the work shown? I’m struggling. 2
ID: 1877732 • Letter: C
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Can anyone answer any of these questions with the work shown? I’m struggling. 2 & 3. And 6-10... Problems... Show all work while solving the following problems. Write the equation, substitute the numbers (with units) and give the final answer (with units). You may use the GUESS method if you wish. (9 points each) Force = mass x acceleration Weight-mass x gravity 1. How much force is needed to accelerate a 6.0 kg box at a rate of 10.0 m/s?? g = 10 m/s2 2. A 200.0 N force accelerates a box at 15.0 m/s2. What is the mass of the box? 3. A car speeds up from rest to 20.0 m/s in 3.50 seconds. How much force is needed if the car has a mass of 1250 kg? 4. What is the mass of a 210 N person? 10 21K lomisa 5. What is the weight of a 60.0 kg box? A car going 27.4 m/sec slows to a stop in 2.75 sec. What is its acceleration rate? How much force is needed if the car has a mass of 1475 kg? 6. 7. What is the acceleration rate of a 35 kg box sliding down an incline with a force of 125 N? 8. A 500.0 N force is applied to a box that slides horizontally with an acceleration of 16.0 m/s2 What is the mass of the box? How much does the box weigh? 9. What is the weight of 20.0 Kg of concrete? 10. A 16.0 kg box slides 6 m when pushed with a 190.0 N force. How much does the box weigh?Explanation / Answer
2. force F = mass * accleration
F = ma
m = F/a
m = 200/15
m = 13.34 kg
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3. given intial velocity u = 0 m/s
final velocity v = 20 m/s
time t = 3.5 s
Force F = ?
mass m = 1250 kg
F = m a
accleration a = (v-u)/t
a =(20-0)/3.5 = 5.71 m/s^2
so F = 1250* 5.71
F = 7142.85 N
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6. a = dV/t
a = (27.4 -0)/2.75
a 10 m/s^2
Force F = ma = 1475*10 =14750 N
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7.a = F/m
a = 125/35 = 3.57 m/s^2
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8. m = F/a = 500/16 = 31.25 kg
Weight = mg = 31.25* 9.81 = 306.56 N
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9. Weight W = mg
W = 20* 9.81 = 196.2 N
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10. weight W = mg
W = 16*9.81
W = 157 N
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