UNIT 1
Vectors and Scalars
Forces and Acceleration
Distance and Displacement
Speed and Velocity
100
True or False (IF FALSE, correct the sentence): 3,001,000.0 has more than 4 significant figures.
True.
100
True or False (IF FALSE, correct the sentence): Scalars have magnitude and direction.
False. Scalars have only magnitude.
100
True or False (IF FALSE, correct the sentence): When an object hits another object with more mass, the object with more mass moves farther.
False: When an object hits another object with more mass, the object with LESS mass moves farther.
100
True or False (IF FALSE, correct the sentence): When an object comes back to the starting point, the distance is zero.
False. ...the displacement is zero.
100
True or False (IF FALSE, correct the sentence): The average velocity is total velocity divided by the total time.
False, ...total displacement divided by total time.
200
4000 milligrams is equal to: A) 40 grams B) 40 kilograms C) 4 grams D) 40 decigrams
C) 4 grams
200
Which one is NOT a vector? A)Force B) Speed C) Displacement D) Acceleration
B) Speed.
200
According to Newton’s Second Law of Motion, when an object if a certain mass is pushed with continuous force, it… A) moves faster and faster B) it moves slower and slower C) moves with the same speed it started D) does not move at all
A) moves faster and faster (in other words...accelerates)
200
A person walks 5.0 kilometers north, then 5.0 kilometers east. His displacement is closest to A) 7.1 km NE B) 7.1 km NW C) 10 km NE D) 10 km NW
A) 7.1 km NE
200
In a 4.0-kilometer race, a runner completes the first kilometer in 5.9 minutes, the second kilometer in 6.2 minutes, the third kilometer in 6.3 minutes, and the final kilometer in 6.0 minutes. The average speed of the runner for the race is approximately A) 0.16 km/min B) 0.33 km/min C) 12 km/min D) 24 km/min
A) 0.16 km/min
300
Write 0.00001011010111000 is written in scientific notation using 3 significant figures.
1.01 x 10^-5
300
Vector A has 4 units and is going east. Vector B has 6 units and going west. What is A+B ? A)2, east B) 10, east C) 10, west D) 2, west
4-6= -2 so D) 2, west
300
If an object with mass of 50kg is experiencing 100N of force, then what is the magnitude of the acceleration in the nearest digit?
a= F/m= 100N/50kg = 2 m/s/s
300
A dog walks 8.0 meters due north and then 6.0 meters due east. Determine the magnitude of the dog’s total displacement.
10m NW
300
What is the average velocity of a car that travels 30. kilometers due west in 0.50 hour? (Remember, velocity must include unit and direction).
60 km west
400
Calculate: Using dimensional analysis, convert 90.m/s into km/hr. Express your answer in scientific notation using 2 significant figures. [1000m=1km] [1hr=3600s]
90/1000 x 3600 = 324 = 3.2 x 10^2 km/hr
400
Calculate the resultant vector: 5 yards east then 5 yards north. Write your answer to the nearest tenth.You must include magnitude, unit, AND direction.
7.1 yards NE
400
Calculate: An object that is experiencing normal force of 10N experiences 10N of frictional friction which pushed on a surface. What is the coefficient of kinetic friction? [Use F=µN]
1
400
A child walks 5.0m north, then 4.0m east, and finally 5.0m south. What is the magnitude of the resultant displacement of the child after the entire walk? Answer in the correct significant figures and include the unit.
4.0m East
400
If the displacement is increasing at a steady pace for an object, what does that mean for the velocity of the object? Write in a form of a sentence.
If the displacement is increasing steadily, then it means the velocity for the object is constant at all times.
500
Calculate: Answer in scientific notation using significant figure rules: (5.01 x 10^4) x (6.2 x 10^2)
3.1 x 10^7
500
If the resultant is 30 degrees above the horizontal vector component and the vertical component is 25m, what is the magnitude of the resultant vector? Include units.
50m
500
Explain in maximum of 4 sentences how ALL THREE Newton’s Laws applies to shooting a basketball through the hoop. Each sentence must identify the Newton’s Laws. This must be written first and then clearly read out loud.
Something close to: When the ball is at rest in the player's hands, it experiences first law because it wants to stay at rest until the player flicks it. For the second law, when the force is applied from the hand and accelerates the ball because of F=ma. Finally, the ball is pushing back to the hand with equal and opposite force because of third law: for every action there's equal and opposite reaction.
500
Determine the total displacement to the nearest tenth (INCLUDE UNIT AND DIRECTION) of the person who walked in this path: [See the diagram on the review sheet].
2.8 m SE
500
A car is moving with a constant speed of 20. meters per second. What total distance does the car travel in 2.0 minutes? Remember to include units.
d=s*t = 20m/s*2min*60s/1min= 2400m
M
e
n
u