A 3 kg box is rolling along a smooth table. During a 5 second time interval, two forces act on the box: 5 N to the right and 3 N to the left.

Question 1

What is the momentum of this box after the 5 second interval if its momentum right before the time interval is 15 kg*m/s right?

Group of answer choices

5 kg*m/s right

10 kg*m/s right

25 kg*m/s right

-5 kg*m/s right

Question 2

A 3 kg box is rolling along a smooth table. During a 5 second time interval, two forces act on the box: 5 N to the right and 3 N to the left.

What is the momentum of this box after the 5 second interval if its momentum right before the time interval is 10 kg*m/s LEFT?

Group of answer choices

zero

20 kg*m/s right

20 kg*m/s left

10 kg*m/s right

Question 3

An object has a momentum of 9 kg*m/s North.

A net force of 2 Newtons North acts upon this object for 5 seconds.

What is the momentum of the object after this impulse?

Group of answer choices

19 kg*m/s North

1 kg*m/s South

19 kg*m/s South

19 kg*m/s

Question 4

What is the impulse delivered by a net force of 5 N up acting for 3 seconds?

Group of answer choices

15 kg*m/s up

15 kg*m/s

15 up

8 N*s up

Question 5

A net force of 2 Newtons North acts for 5 seconds on an object.

What impulse is delivered to this object?

Group of answer choices

15 kg*m/s North

10 kg*m/s North

8 kg*m/s North

3 kg*m/s North

Question 6

A box is in equilibrium on the surface of the earth for 10 seconds straight. There are two forces that act on the box: 25 N down by the earth because of gravity and 25 N up by the ground because of structural support.

What is the net force on the box during this 10 seconds?

Group of answer choices

25 N up

zero

25 N down

10 N*s up

Question 7

A box is in equilibrium on the surface of the earth for 10 seconds straight. There are two forces that act on the box: 25 N down by the earth because of gravity and 25 N up by the ground because of structural support.

What impulse is being delivered to the momentum of the box during this 10 seconds?

Group of answer choices

zero

250 kg*m/s up

250 kg*m/s down

250 kg*m/s

Question 8

A moving car needs to stop but its brakes are not working. It has a choice of running into either a large cement wall or a barn full of flowers. Either of these choices will work and remove all of the car's motion.

Which of these choices will provide the greater impulse?

Group of answer choices

they both give the same impulse

running into the barn of flowers will give the greater impulse

running into the cement wall will give the greater impulse

Question 9

What is the difference between the momentums of the following two objects?

• a 2 kg object moves up at 3 m/s
• a 3 kg object moves down at 2 m/s

Group of answer choices

they are opposite to each other

the 2 kg has more momentum than the 3 kg

nothing; they are exactly the same

the 3 kg has more momentum than the 2 kg

Question 10

Why is it, that when a quantity of momentum is described, the units are kg*m/s (kilograms times meters per second)?

Group of answer choices

it's because momentum is calculated with mass multiplied by velocity

it's because momentum is acceleration

it's because momentum is force

it's because momentum is inertia