Acceleration, Mass and Weight
What is the mass of a 10 kg object on the moon?
10 kg. Your mass doesn't change.
A 3 kg car is moving 4 m/s when it collides with a 5 kg car moving 2 m/s. What is their velocity after the collision?
2.75 m/s
If you push a box 5 N to the right and your friend joins you and pushes 15 N, but your mom pushes the box in the opposite direction with 40 N. What will happen to the box?
The box will move Left.
Momentum is the product of ______ and ______.
Mass and velocity
Why is your displacement on a track zero?
Because you are changing directions
7.65 kg
Why would a heavy cargo ship travel at the same speed as a small cargo ship?
The heavy cargo ship has a larger momentum.
If you are pulling a bowl of cereal toward you with 15 N of force, but your sibling pulls the cereal toward them on the opposite side of the table with 20 N of force, then what is the net force acting on the bowl?
(You are on the left and your sibling is on the right)
5 N to the right.
100 N to the left.
Draw a velocity time graph that shows + acceleration.
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a. 10 kg
b. 50 kg
c. 25 kg
d. 100 kg
100 kg, a = 1 m/s^2
What is the momentum of a 10 kg car traveling 25 m/s?
250 kgm/s
If you are moving a couch with your friend, you apply a force of 150 N and your friend applies a force of 300 N. What is the net force acting on the couch?
450 N
How could you best protect and egg if it were in a box?
Add a second layer of bubble wrap around the box
Use a wooden box instead of a cardboard box.
Wrap each egg in metal foil before placing it inside the box.
Separate the eggs with bubble wrap inside the box.
Draw a velocity time graph that is - acceleration.
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Calculate the acceleration of a car that speeds up going 15 m/s to 25 m/s in 60 s.
0.17 m/s^2
Which object would have the smallest force?
a 5 kg object accelerating at 10 m/s2
When a car traveling at 60 mphcrashes, what physical principle explains why wearing a seatbelt reduces injury?
A. It decreases the time of impact, increasing force
B. It increases the time of impact, decreasing force
C. It adds more force to the collision
D. It completely eliminates all forces
It increases the time of impact, which decreasing force
Silas traveled 100 m to Hardee's then retraced his steps. What is the total distance Silas traveled?
200 m
Calculate the acceleration of an object that exhibits a force of 20 N and has a mass of 10 kg.
2 m/s^2
What is the momentum of a 2.5 x 103kg car that was moving 30 km/h?
75 x 103 kgkm/h or 7.5 x 104 N*s
A 15 N force is acted upon a box, but there is 5 N of friction. What will happen to the box?
The box will move forward with an increasing speed.
Why would a car be built to collapse?
It is less expensive and more cost effective to use weaker materials in the construction of the engine compartment.
By confining the damage to the front part of the car, the collapsing engine compartment reduces the total cost of repairs.
As the materials of the engine compartment bend, they absorb energy and protect the passengers from the forces of the collision.
As the materials of the engine compartment bend, they absorb energy and protect the passengers from the forces of the collision.
Final Jeopardy
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