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1. A man drops a baseball from the roof. Its force is 1.42N. What is the mass?
2. A sea turtle accelerates at 2.8 m/s2. The mass of the sea turtle is 454 kg. What is the force?
3. A speed skater slips at 13.5m/s2. They skinned their knee with a force of 1,100N. What is there mass?
Answers below.
1. A man drops a baseball from the roof. Its force is 1.42N. What is its weight?
1.42N/10m/s2=0.142kg 0.142kg
2. A sea turtle accelerates at 2.8 m/s2. It weighs 454 kg. What is the force?
2.8m/s2*454kg=1271.2N 1271.2N
3. A speed skater slips at 13.5m/s2. They skinned their knee with a force of 1,100N. How much did they weigh?
1,100N/13.5m/s2=81.5kg 81.5kg
A soccer player kicks a ball at 35m/s2. It weighs 0.45kg. How much force was used to move the ball?
A diver jumps into the pool on Earth with a force of 820N. How much do they weigh?
A football player runs down field at 850N. He weighs 84 kg. How fast are they accelerating?
A soccer player kicks a ball at 35m/s2. It weighs 0.45kg. How much force was used to move the ball?
35m/s2*0.45kg=15.75N 15.75N
A diver jumps into the pool with 820N. How much do they weigh?
820N/10m/s2=82kg 82kg
A football player runs down field at 850N. He weighs 84kg. How fast is he accelerating?
850N/84kg=10.12m/s2 10.12m/s2
A piece of paper blows in the wind at 0.081N. It weighs 0.0045kg. How fast is the acceleration?
A freefalling skydiver on earth weighs 114 kg. How much force are they falling with?
A cadaver rolls down the hallway on a gurney at 2.5 m/s2. It is being pushed at a force of 550 N. How much do they weigh?
A piece of paper blows in the wind at 0.081N. It weighs 0.0045kg. How fast is the acceleration?
0.081 N/0.0045 kg= 18m/s2 18 m/s2
A freefalling skydiver weighs 114kg. How much force are they falling with?
114 kg*10 m/s2=1140 N 1140 N
A cadaver rolls down the hallway on a gurney at 2.5m/s2. It is being pushed at a force of 550N. How much do they weigh?
550 N/2.5 m/s2=220 kg 220 kg
1.A car accelerates at 35 meters per second. It has a mass of 1800kg. What is the force of the car?
2.A running child’s weight on Earth is 950 N. What the child’s mass?
3.A plane begins moving for liftoff at a force of 5,360,000 N. Its mass is 80,000 Kg. What is the plane’s acceleration?
4. A dog runs at 13 m/s2. It weighs 533 N. What is its Mass?
1. A car accelerates at 35 meters per second. It has a mass of 1800kg. What is the force of the car?
35*1800= 63,000N 6.3*10^4N
2. A running man’s weight is 950 N. What is his mass?
950N / 10m/s=95kg 95kg
3. A plane begins moving for liftoff at a force of 5.36*10^6 N. Its mass is 8.0*10^4kg. What is the plane’s acceleration?
(5.36*10^6N)/(8.0*10^4kg)=67m/s2 67 m/s2
4. A dog runs at 13 m/s2. It weighs 533 N. What is its Mass?
533N/13m/s2 =41kg 41 kg
1. What is the Fc if the mass is 20,000 g , the velocity is 5 m/s and it is traveling around a 2 m radius circle?
2. What is the velocity of a 5 Kg object going around a 20 m radius circle with a force of 1000 N?
3. What is the mass of an object going around a 20 m radius circle at a velocity of 2 m/s with a force of 200 N?
1.
• Convert g to Kg
• 20,000 g =20 Kg
• Use the proper equation
• Fc=mv2/r
• Fc=20 Kg(5 m/s)2/2m
• Fc=250 N
2.
• Use the proper equation
• Fc=mv2/r
• 1000 N=5 Kg(v m/s)2/20 m
• (4)*1000 N=1/4 (4)(v)2
• 4000 = v2
• V=63.25 m/sec
3.
• Use the proper equation
• Fc=mv2/r
• Change equation to m=F(r)/m
• 200 N=? Kg(2 m/s)2/20 m
• 5*200 N=? Kg(1/5)5
• Mass=1000 Kg
1. What is the Fc if the mass is 5,000 g , the velocity is 100 m/s and it is traveling around a 10 m radius circle?
2. What is the momentum if a 200 Kg car driving 30 m/s?
3. What is the mass of an object going around a 2 Km radius circle at a velocity of 10 m/s with a force of 400 N?
1.
• Use the proper equation
• Fc=mv2/r
• Fc=5 Kg(100 m/s)2/10 m
• Fc=5 Kg(10,000 m2/s2) /10 m
• Fc=5000 N
2.
• Use the proper equation
• momentum=MV
• momentum=200 Kg * 30 m/s
• momentum= 6,000 Kgm/s
3.
• Use the proper equation
• Fc=mv2/r
• 400 N=? Kg(10 m/s)2/2000 m
• 20*400 N=? Kg(1/20)20
• Mass=8,000 Kg
1. What is the Fc if the mass is 4500 g , the velocity is 125 m/s and it is traveling around a 35 m radius circle?
2. What is the momentum if a 325 Kg car driving 25 m/s around a 75m radius curve?
3. What is the mass of an object going around a 5 Km radius circle at a velocity of 25 m/s with a force of 367 N?
1.
• Use the proper equation
• Fc=mv2/r
• Fc=4.5 Kg(125 m/s)2/35 m
• Fc=2008.9 N
2.
• Use the proper equation
• momentum=MV
• momentum=325 Kg * 25 m/s
• momentum= 8125 Kg*m/s
3.
• Fc=mv2/r
• 367 N=? Kg(25 m/s)2/5000 m
• 367N=? Kg(625 m2/s2)/5000 m
• 367N /.125 =? Kg (.125)/.125
• Mass=2936 Kg
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