Sem 2 Final Review

A 5 kg and a 7 kg cart collide and stick to each other. If the 5 kg cart was moving 3.0 m/s and the 7 kg cart was moving -2.0 m/s, how fast are they moving together after the collision?

Answer explanation

A 1200 kg car takes a turn around a 25 m circle. If the coefficient of static friction between the tires and the road is 0.9, what is the fastest speed the car can take the turn without sliding?

Answer explanation

A mass on a spring has a period of 0.25 s. If it is attached to a spring that has a spring constant of 300 N/m, what is the mass of the object?

Answer explanation

What are the first 3 harmonics of a closed pipe with a length of 1.5m played in air with a temperature of 28 degrees Celsius?

Answer explanation

What is the current flowing out of the battery in the circuit pictured?

Answer explanation

Momentum is the product of an object's _______?

• Force and Time

• Mass and Velocity

• Mass and Acceleration

• Velocity Acceleration

Tags

NGSS.HS-PS2-2

A cart with 10 kg*m/s of momentum collides with an identical cart that is at rest. What is their total momentum after?

• 10 kg*m/s

• 5 kg*m/s

• 20 kg*m/s

• it depends on if they stick or not

Tags

NGSS.HS-PS2-2

If you decrease speed what happens to momentum?

• it increases

• it remains the same

• it decreases

• it depends on the acceleration

Tags

NGSS.HS-PS2-2

In which type of collision is Kinetic Energy conserved

• elastic

• inelastic

• all collisions

• no collisions

If you double the distance between a planet and its moon, what happens to the force of gravity between them?

• 2 times what it was before

• 4 times what it was before

• 1/2 of what it was before

• 1/4 of what it was before