WorksheetsTest: Chapter 6 - Newton’s Second Law (12/14)
Total questions: 39
Worksheet time: 31mins
(True or False.) An object's velocity can be changed by changing its speed, its direction, or both.
(a)
An object's velocity can be changed by changing its:
speed
direction
color
mass
A 20 kg bike accelerates at 10 m/s2. What is the force acting on the bike?
(a)
When force is 20 N, mass is 5 kg, what is acceleration?
F = ma
25 m/s2
5 m/s2
100 m/s2
4 m/s2
If a force of 50 Newton's was applied to an object with a mass of 500 grams, what will the object's acceleration be?
10 m/s2
.1 m/s2
100 m/s2
1 m/s2
Jenny applies a 60 N force to a 20 Kg cart, what is the acceleration of the cart if friction can be neglected?
1200 m/s2
0.33 m/s2
20 m/s2
3 m/s2
An object accelerates 5 m/s2 when a force of 20 newtons is applied to it. What is the mass of the object?
4 kg
20 kg
0.5 kg
2 kg
Which of these best states Newton's Second Law?
The greater the mass of an object the greater the force needed to change its motion.
The greater the mass of an object the less force needed to change its motion.
The mass of an object does not effect the force needed to change its motion
20 Newtons is an example of a/an:
mass
weight
force
acceleration
(a) = mass x acceleration
Newton's 2nd Law states an increase in mass of an object will cause the acceleration to (a) only if the force is constant
If I apply the same force to a ping pong ball and a bowling ball, which one will accelerate farther and faster?
ping pong ball
bowling ball
I have no idea
How is your time at home going?
Fine
Great
Bad
Boring
Consider a heavy and a light person jumping together with same-size parachutes from the same altitude. Who will reach the ground first? (in NON-freefall)
Light person
Heavy person
Both will reach at the same time.
As a rock in FREE FALL falls through the air, Velocity
stays constant
decreases until it hits terminal velocity
increases until it hits terminal velocity
increases ~10 m/s each second
Air friction (Air Drag) against a skydiver.... (Choose all the right answers)
acts upward.
increases with increased surface area.
increases with increased speed.
none of these.
The acceleration of a freely falling body on Earth is
9.8 m/s.
9.8 m.
9.8 m/s2.
9.8 s.
The state that exists when the only force acting on an object is gravity is called
free fall
inertia
acceleration
momentum
(True or false.) Heavier objects free fall faster than lighter objects. (in the absence of the air resistance)
(a)
What makes life easier?
fried fish with bones in it
watermelons with seeds
using -10 m/s2 for acceleration due to gravity
timed exams
What does acceleration due to gravity mean? (Choose all the correct answers.)
an object gains 10 m/s every second it falls
an object falls at a constant velocity of 10 m/s
an object loses 10 m/s every second it rises
Dear Diary, why did I take this class????
As the skydiver in NON FREE FALL falls faster and faster through the air, AIR RESISTANCE
increases
decreases
stays the same
doesn't change -air resistance is negated in Non-free fall
Terminal speed occurs when acceleration terminates,
when air resistance equals weight (mg) and net force is zero.
True
False
5. What happens to the acceleration of an object that is dropped from a height and allowed to fall freely?
A. it increases
B. it decreases
C. it remains the same
D. it is always zero
10. If a bowling ball and a feather are simultaneously dropped from the same height in a room void of air, which object will reach the ground first?
A. The feather because it is lightweight.
B. The bowling ball because heavier objects fall faster than lighter objects.
C. The bowling ball because the feather will drift off from its vertical path downward.
D. The objects will reach the ground at the same time since they accelerated at the same rate from rest simultaneously.
What is the unit of measurement for pressure?
(a)
How do you Calculate Pressure
Force(N)/Area(m2)
Force(kg)/Area(mi2)
Area(m2)/Force(N)
What is pressure?
The amount of force exerted on a surface
The surface area of an object
The weight of an object
Choose two correct applications that exert high pressure.
Tractors have big and wide wheels
Press a thumbtack into a plank
Studs on the sole of football boots
Shoulder pad for a school bag
Amira puts two books on a table as shown in the diagram. The books are the same size and mass. Which book exerts greater pressure on the table?
A
B
Which sentence is the MOST RIGHT fit for this image?
Flat shoes are better than heels.
Pressure distribution is less for flat shoes.
In muddy area, it's not a good idea to wear heels.
Less the area, less is the pressure. So heels create less pressure.
Read both the image captions/explanations. Write a caption for the third image without explanation.
Caption-
