2021 Conceptual Physics Semester 1

Question 1

Which is false of objects A & B held a distance apart before moving due to mutual gravitation?

Accepted Answer

the objects will have a constant force acting on them

Question 2

A semi-truck hits a traffic cone, compared to the acceleration of the truck, the cone's is

Accepted Answer

larger

Question 3

What is the vertical component of a 30-m/s object fired at 15° above horizontal?

Accepted Answer

7.76-m/s

Question 4

A semi-truck hits a traffic cone, compared to the force on the truck the force on the cone

Accepted Answer

is equal

Question 5

(Not on Test) On a picnic you bring a bunch of food to eat, which will warm up the slowest on a hot day

Accepted Answer

Watermelon

Question 6

The force of attraction between a 3250-kg object and a 5000-kg object 1.5-m apart

Accepted Answer

4.8 x 10-4 N

Question 7

Which is not true of the horizontal component of a projectile's motion?

Accepted Answer

it is independent of time

Question 8

Which is not true for a constantly accelerating object

Accepted Answer

must move in a straight line path

Question 9

What is the MA of a 10-m long ramp that is 3-m tall if you slide a 50-kg box with 147-N?

Accepted Answer

3.33

Question 10

Box A has a mass of 50-kg, Box B has a mass of 35-kg. If 30-N is applied, what is FA on B?

Accepted Answer

12.3-N

Question 11

What is the work required to deadlift 50-kg to a height of 0.5-m?

Accepted Answer

245-J

Question 12

A semi-truck hits a traffic cone, compared to the impulse on the truck, the cone's is

Accepted Answer

equal

Question 13

A semi-truck hits a traffic cone, compared to the change in momentum of the truck, the cone's

Accepted Answer

is equal

Question 14

What is the acceleration of a ball that takes 30-s to reach a velocity of 45-m/s from rest?

Accepted Answer

1.5-m/s2

Question 15

A 450kg object moving 7.5m/s hits a stationary 70kg object, bounces at -3m/s, what is the Vf?

Accepted Answer

67.5-m/s

Question 16

Which is not a reason a loaded train takes longer to stop than an empty train at the same speed

Accepted Answer

the loaded train is longer

Question 17

When an object reaches terminal velocity which of the following is most correct?

Accepted Answer

the weight of the object is equal to the air resistance

Question 18

When a projectile is fired at an angle & is flying along

Accepted Answer

its acceleration is constant throughout

Question 19

How high could a baseball go if it was thrown 15-m/s at 45°?

Accepted Answer

5.7-m

Question 20

If you threw a 5-kg stone horizontally at 15m/s from 1000-m cliff, how far away would it land?

Accepted Answer

214-m

Question 21

Which of the following is not a vector quantity?

Accepted Answer

Mass

Question 22

rate of the distance travelled in a certain direction per unit time

Accepted Answer

Velocity

Question 23

An 450kg object moving 7.5m/s hits a stationary 70kg object and they stick, what is the Vf?

Accepted Answer

6.5-m/s

Question 24

What would be the acceleration of a 1250-kg car that whose engine puts out 750-N?

Accepted Answer

0.6-m/s2

Question 25

A projectile fired at what angle will travel the farthest distance?

Accepted Answer

45°

Question 26

A ball is dropped from a tower and an equally sized ball is thrown horizontally simultaneously

Accepted Answer

they hit at the same time

Question 27

Which is not true of objects fired at the same speed at complementary angles?

Accepted Answer

they have the same maximum height

Question 28

Objects A & B of differing mass are in a portion of space, not moving. The force of gravity

Accepted Answer

between the objects is equal

Question 29

Two objects of differing mass are in a portion of space where gravity is negligible, not moving

Accepted Answer

the more massive object would be harder to shake

Question 30

When a projectile is fired at an angle & is flying along, at it's zenith (highest point)

Accepted Answer

it's motion is only in the horizontal

Question 31

How high is a cliff if an object thrown horizontal at 2-m/s takes 2.5-s to hit the ground?

Accepted Answer

30.6-m

Question 32

An object is lifted to 3-m resulting in a potential energy of 9-J, if dropped

Accepted Answer

the kinetic energy would be 9-J when it hits the ground

2021 Conceptual Physics Semester 1

Questions 32

2021 Conceptual Physics Semester 1

Questions 32