Ch 7 Momentum and Impulse

What is the momentum of a 15-kg dog moving with a velocity of 2.1 m/s to the east?

• $31.5\ kg\times m/s$ east

• $31.5\ kg\times\frac{m}{s^2}$ east

• $7.14\ kg\times m/s$ east

• $7.14\ kg\times\frac{m}{s^2}$ east

Tags

NGSS.HS-PS2-2

An object that has momentum can be described as _________

• a) changing its velocity

• b) moving fast

• c) resisting changes in its state of motion

• d) having its mass in motion

• e) encountering a net force

Tags

NGSS.HS-PS2-2

Which one of the following units represents the standard metric units of impulse

• Kilograms * meter / second²

• Newton * meter

• meter / second²

• Newton * second

Which one of the following units represents the standard metric units of momentum

• Newtons * meter / second

• Kilograms * meter / second²

• meter / second

• Kilograms * meter / second

Tags

NGSS.HS-PS2-2

During a collision. an object experiences an impulse. How can this impulse be calculated?

• Multiplying force by time

• Multiplying mass by velocity

• Dividing velocity by time

• Multiplying mass by acceleration

Tags

NGSS.HS-PS2-1

During a collision. an object experiences an impulse. The impulse causes and is equal to the _____ of the object

• energy change

• kinetic energy change

• force

• momentum

• momentum change

Tags

NGSS.HS-PS2-2

When a cannon fires a cannon ball, it recoils backwards. This occurs because of...

• Energy in the system is conserved

• Energy in the system is increased

• Momentum in the system is conserved

• Energy in the system is not conserved

Tags

NGSS.HS-PS2-2

A freight car of mass 20,000kg moves along a track at 15 m/s. What is the momentum of the car?

• 30,000 kg*m/s

• 3,000 kg*m/s

• 300,000 kg*m/s

• 3,000,000 kg*m/s

Tags

NGSS.HS-PS2-2

A 2kg object moving at 5 m/s encounters a 30 N resistive force over a duration of 0.10 seconds. The impulse experienced by this object is _____

• 0.30 N*s

• 2 N*s

• 2.5 N*s

• 3 N*s

• 7 N*s

Tags

NGSS.HS-PS2-1

A 5kg ball has a momentum of 30 kg*m/s. What is the speed of the ball

• 150 m/s

• 35 m/s

• 6 m/s

• 5 m/s

Tags

NGSS.HS-PS2-2