Pulleys

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

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

How much is Fnet on the system?

• 40 N

• 50 N

• 10 N

• 4 N

Tags

NGSS.HS-PS2-1

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

Calculate the acceleration of the system.

• 30/4 m/s²

• 10/4 m/s²

• 5 m/s²

• 20 m/s²

Tags

NGSS.HS-PS2-1

What Unit do we Measure Force in? 

• Newtons
• Joules
• Force
• Kilograms

With unbalanced forces, the object will move in the direction that the _______ force is being applied.

• larger 
• smaller 
• equal 
• less

Tags

NGSS.HS-PS2-1

If you exert a net force of 8 N on a 2-kg object, what will its acceleration be?

• 2 m/s^2
• 4 m/s^2
• 16 m/s^2
• 10 m/s^2

Tags

NGSS.HS-PS2-1

An object can exert a force on itself.

• True

• False

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

• 3.33 m/s^2

• 2.22 m/s^2

• 0.3 m/s^2

• 1 m/s^2

Tags

NGSS.HS-PS2-1

If m1 = 5 kg and m2 is 10 kg, what is the tension in the string? (Hint: you'll need the acceleration you found in another question and REMEMBER YOUR UNITS!)

Answer explanation

Remember, you don't have to use the mass of the entire pulley, just one of the masses!

Tags

NGSS.HS-PS2-1