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Conceptual Physics Semester 1 Flashcards | StudBud
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Conceptual Physics Semester 1
Conceptual Physics Semester 1
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Conceptual Physics Linear Motion, Projectiles, Newton's Laws, Momentum, Energy, Gravity,
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Answers
1
Two objects of differing mass are in a portion of space where gravity is negligible, not moving
the less massive object would be easier to lift
lifted with the same force they would accelerate equally
the more massive object must be larger
the more massive object would be harder to shake
2
How high is a cliff if an object thrown horizontal at 2-m/s takes 2.5-s to hit the ground?
19.6-m
61.25-m
30.6-m
5-m
3
Which is not true for a constantly accelerating object
must move in a straight line path
must have momentum
must have an impulse
must have a force acting on it
4
A semi-truck hits a traffic cone, compared to the change in momentum of the truck, the cone's
momentum cannot change
is equal
is larger
is smaller
5
Objects A & B of differing mass are in a portion of space, not moving. The force of gravity
is greater on the more massive object
between the objects is equal
is greater on the less massive object
is proportionate is inversely proportional to their masses
6
Which is not true of the horizontal component of a projectile's motion?
it is independent of vertical displacement
the horizontal velocity component is independent of gravity
it is independent of the vertical component of velocity
it is independent of time
7
On a picnic you bring a bunch of food to eat, which will be the slowest to fall on a hot day without air resistance?
Dry Roasted Peanuts
Marble Cheese board
Watermelon
All fall at same rate
8
Heat (energy) transfer via two objects sliding past one another
Conduction
Radiation
Convection
Friction
9
When a projectile is fired at an angle & is flying along, at it's zenith (highest point)
it's motion is only in the vertical
it's motion is only in the horizontal
it's motion in the vertical and horizontal cannot change
it's motion is equal in the vertical and horizontal
10
Two objects have different masses but the same momentum, there the impulse to stop them is
Greater for the object with more mass
Equal for both objects
Greater for the object with less mass
Greater for the object moving the fastest
11
A semi-truck hits a traffic cone, compared to the force on the truck the force on the cone
is larger
depends on the size of the cone
is smaller
is equal
12
A projectile fired at what angle will travel the farthest distance?
45°
60°
90°
30°
13
When a projectile is fired at an angle & is flying along
its acceleration is constant throughout
its acceleration varies based on the angle of release
its acceleration is greatest at its highest point
its acceleration is zero at its highest point
14
What would be the acceleration of a 1250-kg car that whose engine puts out 750-N?
1.67-m/s2
0.6-m/s2
937500-m/s2
2000-m/s2
15
How high could a baseball go if it was thrown 15-m/s at 45°?
11.4-m
5.7-m
1.53-m
1.08-m
16
Which is not true of objects fired at the same speed at complementary angles?
they have the same maximum height
they have the same horizontal displacement
they have different hang times
they have different vertical components of velocity
17
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?
3.33
147-J
0.3
1470-J
18
What is the acceleration of a ball that takes 30-s to reach a velocity of 45-m/s from rest?
75-m/s2
0.67-m/s2
1.5-m/s2
1350-m/s2
19
When an object reaches terminal velocity which of the following is most correct?
the object's velocity is zero
there are no forces acting on the object
the weight of the object is equal to the air resistance
there is no longer any air resistance
20
What is the work required to deadlift 50-kg to a height of 0.5-m?
6.25-J
25-J
490-J
245-J
21
Which is false of objects A & B held a distance apart before moving due to mutual gravitation?
the force acting on both objects is equal
the objects will accelerate toward one another
the distance travelled by each object will be different
the objects will have a constant force acting on them
22
A box is being lifted with a string upwards, and the box is accelerating down this means
FT > Fg
FT = Fg
FT < Fg
More information is necessary
23
The force of attraction between a 3250-kg object and a 5000-kg object 1.5-m apart
7.22 x 10-4 N
4.8 x 10-4 N
7.22 x 1018 N
4.82 x 1018 N
24
A semi-truck hits a traffic cone, compared to the acceleration of the truck, the cone's is
smaller
equal
larger
25
Box of mass M and Box of 2M are pushed together to the right on a frictionless surface, the force between the boxes is
FN,on M, by 2M = 2 FN,on 2M, by M
2 FN,on M, by 2M = FN,on 2M, by M
FN,on M, by 2M = FN,on 2M, by M
It depends on how much they accelerate
26
Which is not a reason a loaded train takes longer to stop than an empty train at the same speed
the loaded train has more kinetic energy
the loaded train is longer
the loaded train has more momentum
the loaded train has more inertia
27
A 450kg object moving 7.5m/s hits a stationary 70kg object, bounces at -3m/s, what is the V
f
?
67.5-m/s
28.9-m/s
7.0-m/s
6.1-m/s
28
Mr. Young has owned 3 dogs, as an adult they have all been
Weimaraner
Keeshond
Siberian Husky
Puggle (Pug + Beagle Mix)
29
A semi-truck hits a traffic cone, compared to the impulse on the truck, the cone's is
smaller
larger
equal
30
Box of mass M and Box of 2M are sliding without friction at V, the force to accelerate at A for
2M is twice than for M
M is a quarter than 2M
Both boxes is the same
M is twice than for 2M
31
An object is lifted to 3-m resulting in a potential energy of 9-J, if dropped
the kinetic energy would be 9-J when it hits the ground
the work done would be 27-J when it hits the ground
the velocity would be 9-m/s when it hits the ground
the object has a mass of 3-kg when it hits the ground
32
A box is being pulled to the right with a string at a constant rate along a flat surface, this means
FT > Ff
FT = Ff
FT < Ff
More information is necessary
33
What is the vertical component of a 30-m/s object fired at 15° above horizontal?
30-m/s
15-m/s
7.76-m/s
28.98-m/s
34
A ball is dropped from a tower and an equally sized ball is thrown horizontally simultaneously
the dropped ball hits first
the thrown ball hits first
they hit at the same time
the speed of the thrown ball determines which hits first
35
Which of the following is not a vector quantity?
Velocity
Acceleration
Force
Mass
36
Box A has a mass of 50-kg, Box B has a mass of 35-kg. If 30-N is applied, what is F
A on B
?
10.5-N
17.5-N
0.35-N
12.3-N
37
rate of the distance travelled in a certain direction per unit time
Speed
Acceleration
Velocity
Kinetic Energy
38
If you threw a 5-kg stone horizontally at 15m/s from 1000-m cliff, how far away would it land?
14.29-m
1000-m
214-m
66.7-m
39
An 450kg object moving 7.5m/s hits a stationary 70kg object and they stick, what is the V
f
?
6.5-m/s
1.2-m/s
7.5-m/s
4.2-m/s
