In order to produce an acceleration you need

Group of answer choices

a zero net force

velocity

mass

a not zero net force

Flag question: Question 5Question 51pts

Which ones are examples of vector quantities

[select all that apply]

Group of answer choices

40 km/s South

10 grams

3 cm

1 Newton upwards

Flag question: Question 6Question 61pts

Force, acceleration and velocity are all examples of

Group of answer choices

vector quantities

scalar quantities

Flag question: Question 7Question 71pts

Mass, volume and speed are all examples of

Group of answer choices

vector quantities

scalar quantities

Flag question: Question 8Question 81pts

If you apply 10 N of force upwards and 5 N of force downwards, what is the resultant force?

Group of answer choices

5 N downwards

10 N downwards

15 N upwards

5 N upwards

Flag question: Question 9Question 91pts

What is the resultant magnitude when adding the vectors below?

Group of answer choices

2

46

23

232

Flag question: Question 10Question 101pts

A system is in equilibrium if the

Group of answer choices

Net force 0

Net force = 0

Flag question: Question 11Question 111pts

If a system is in equilibrium

Group of answer choices

It can be moving but not accelerating

It is accelerating

It is not moving nor accelerating

Flag question: Question 12Question 121pts

If the plane below has an acceleration = 0, then

Group of answer choices

Flift = 0 N and Fdrag = -15000 N

Flift = 10000 N and Fdrag= -15000 N

Flift = 12500 N and Fdrag = -12500 N

Flift = 15000 N and Fdrag = -10000 N

Flag question: Question 13Question 131pts

If a cyclist finished a 100 km leg of the Tour de France in 3 hours, what was the cyclist's average velocity?

Group of answer choices

33 m/s

3.3 km/h

33 km/h

100 km/h

Flag question: Question 14Question 141pts

A car breaks from 90 km/h to a full stop in 10 s, what is its acceleration? HINT: Watch for the sign, is the car accelerating or decelerating? (remember acceleration is a vector)

Group of answer choices

9 m/s2

90 km/(h s)

-9 km/(h s)

9 km/(h s)

Flag question: Question 15Question 151pts

A rocket accelerates 36 km/h every second, or 36 km/(h s). If 1 h = 3600 s and 1 km = 1000 m what is its acceleration in m/s²?

Group of answer choices

1000 m/s²

36 m/s²

10 m/s²

3.6 m/s²

Flag question: Question 16Question 161pts

A stone is dropped from the edge of a cliffand hits the ground below in 3 s. The hight of the cliffis approximately

Group of answer choices

30 m

45 m

10 m

90 m

Flag question: Question 17Question 171pts

Given the velocity vs. time plot below, what is the acceleration?

Group of answer choices

2 m/s²

1 m/s²

10 m/s²

5 m/s²

Flag question: Question 18Question 181pts

Ignoring friction, If an equal force is applied to a 1 kg box and a 10 kg box, the acceleration of the of the 10 kg box is [ Select ] ["same as", "10 times", "100 times", "1/10"] the acceleration of the 1 kg box.

Flag question: Question 19Question 191pts

Ignoring air resistance, if a 10 kg box and a 100 kg box were both dropped from the top of a building, the acceleration of the 10 kg box would be [ Select ] ["100 times", "10 times", "1/10", "the same as"] the acceleration of the 100 kg box.

HINT: Is the force due to gravity the same for both? What about the acceleration due to the force of gravity a = F_g/m ?

Flag question: Question 20Question 201pts

A skydiver reaches a terminal velocity (i.e constant velocity) of 200 km/ h after a few seconds from jumping offthe plane, what is its acceleration after reaching terminal velocity and before opening the parachute?

Group of answer choices

10 m/s²

20 m/s²

200 m/s²

0 m/s²

Flag question: Question 21Question 211pts

If a semi truck collides with a VW bug that is 100 times less massive, what is the acceleration of the VW bug compared to that of the semi truck during the collision?

Group of answer choices

10 times more

10 times less

100 times more

100 time less

Flag question: Question 22Question 221pts

What is the impulse required to fully stop a 100 gram egg flying at 1 m/ s?

HINT: Watch the units.

Group of answer choices

10 kg m/s

0.1 kg m/s

100 kg m/s

1 kg m/s

Flag question: Question 23Question 231pts

If you don't want the egg in the above problem to break, you can apply the same impulse with 10 times less force by extending the

Group of answer choices

time to stop by 100x

acceleration by 1000x

mass to stop by 100x

time to stop by 10x

Flag question: Question 24Question 241pts

Two ice pucks of the same mass collide and stick together after the collision, if one was at rest and the other one had an initial velocity V_i= 2 m/s, what is their velocity after the collision?

Group of answer choices

4 m/s

2 m/s

0.1 m/s

1 m/s

Flag question: Question 25Question 251pts

Is the Kinetic Energy conserved in the above collision?

Group of answer choices

Yes, it is an elastic collision

No, it is an inelastic collision