HP mass over pulley review

For the system of attached masses m1 & m2, which mass will have a higher acceleration?

• m1

• m2

• Both will have same acceleration because they're attached by a string

Tags

NGSS.HS-PS2-1

If m1 is 5 kg and m2 is 10 kg, what is the acceleration of the system if friction is negligible?

• 3.27 m/s²

• 2.22 m/s²

• 0.3 m/s²

• 1 m/s²

Tags

NGSS.HS-PS2-1

If m1 = 5 kg and m2 is 10 kg, what is the tension in the string? Include units. (2 correct decimal places, put a space between number and unit)

(a)  

Answer explanation

Remember, you don't have to use the mass of the entire pulley system, just mass on table

Tags

NGSS.HS-PS2-1

An Atwood’s machine is set up by suspending two blocks connected by a string of negligible mass over a pulley, as shown above. The blocks are initially held at rest and then released at time t =0 s. What is the acceleration of 3-kg mass ?

• 3.92

• 1.96

• 2.76

• 3.15

• 1.74

Answer explanation

9.8(3-2) / (3+2) = 1.96 m/s/s

vf = a · t = 1.96 · 2 = 3.92 m/s

Tags

NGSS.HS-PS2-1

An Atwood’s machine is set up by suspending two blocks connected by a string of negligible mass over a pulley, as shown above. The blocks are initially held at rest and then released at time t =0 s. The speed of the 3 kg block at time t = 2.0 s is most nearly

• 2.0 m/s

• 4.0 m/s

• 7.0 m/s

• 10.0 m/s

Answer explanation

9.8(3-2) / (3+2) = 1.96 m/s/s

vf = a · t = 1.96 · 2 = 3.92 m/s

Tags

NGSS.HS-PS2-1

How much is Fnet on the system? Round to nearest 10 N.

• 40 N

• 50 N

• 10 N

• 4 N

Answer explanation

39.2 N

Tags

NGSS.HS-PS2-1

Calculate the acceleration of the system. Masses are 3 kg and 1 kg.

• 7.5 m/s²

• 2.5 m/s²

• 4.9 m/s²

• 19.6 m/s²

Answer explanation

9.8(3-1) / 4 = 4.9

Tags

NGSS.HS-PS2-1

If the pulley in an Atwood's machine has a mass, how does it affect the acceleration of the system?

• The system will not move

• The acceleration remains unchanged

• The acceleration decreases

• The acceleration increases

Tags

NGSS.HS-PS2-1

At Atwood's machine has a mass of 400 kg and 150 kg. What will the acceleration of the 400 kg mass be?

• 4.45 m/s²

• 5.25 m/s²

• 6.12 m/s²

• 4.08 m/s²

• 5.94 m/s²

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

At Atwood's machine has a mass of 400 kg and 150 kg. What will the tension be?

• 2138 N

• 1745 N

• 2957 N

• 1005 N

• 2948 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4