Momentum and Impuls 1

The SI unit for linear momentum is :

• kg m s^-2

• kg m s^-1

• kg m s

• kg m^-1 s

Choose the correct answer.

I) momentum is a vector quantity

II) direction of momentum is the same as direction of weight

III) impulse is the change of momentum

iv) momentum increases when the velocity of a body increases

• I and II only

• I and III only

• I , II and III only

• I , III and IV only

When the speed of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.

• doubles.

• quadruples.

• decreases.

Two objects with the same mass will always have the same momentum.

• True

• False

Which of the following equations can be used to directly calculate an object’s momentum?

• p = FΔt

• J = FΔt

• p = mv

• J=mv

The momentum for any object is calculated by

• dividing mass by velocity

• multiplying mass by velocity

• multiplying mass by acceleration

• dividing force by acceleration

Which of the following has the greatest momentum?

• an 18-wheeler tractor trailer at rest

• an average mass person walking

• a sports car driving on the highway

• A baseball thrown by a child

What is the momentum of a 10kg snail moving 2 m/s

• 20
• 2
• 10
• 5

 $p=mV$  What is the momentum of a 3-kg object moving at 5 m/s?

• 15 kgm/s

• 0.2 kgm/s

• 5 kgm/s

• 8 kgm/s

Momentum is a ____________________ quantity

• science
• scalar
• vector
• energy