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WorksheetsUnit 2 Test Corrections
Total questions: 12
Worksheet time: 34mins
The chemical formula for carbonic acid is H2CO3. Which statement describes the number of atoms in THREE molecules of carbonic acid?
Three molecules of carbonic acid would contain 2 atoms of hydrogen, 1 atom of carbon, and 3 atoms of oxygen.
Three molecules of carbonic acid would contains 2 atoms of hydrogen, 3 atoms of carbon and 1 atom of oxygen.
Three molecules of carbonic acid would contain 6 atoms of hydrogen, 3 atoms of carbon, and 9 atoms of oxygen.
Three molecules of carbonic acid would contain 6 atoms of hydrogen, 9 atoms of carbon, and 9 atoms of oxygen.
Two horses pull in opposite directions but together move in the direction shown. Horse 1 pulls with a force of 1560 N. If the net force is 117 N, which of the following measurements must be the force applied by Horse 2?
1443 N
1677 N
1562 N
1560 N
Carts of different masses are pulled along a flat surface. The table shows some variables for each cart.
Which two carts experience the same net force?
A. Carts 1 and 2
B. Carts 1 and 3
C. Carts 2 and 3
D. Carts 2 and 4
A student is pushing two blocks on a smooth, frictionless surface with 75N.
What is the acceleration of the blocks? Enter your answer in the box
(a)
A car is traveling down the street until it comes to a sudden stop at a red light. When the car comes to a sudden stop, two events occur. Event 1: There is no unbalanced force acting on the person driving, so the person initially keeps moving forward. Event 2: The person's forward movement is then stopped by the seat belt exerting a force on the person. The person exerts a force back on the seat belt. Which statement BEST describes the Newton's Laws of Motion acting within each of the 2 events?
A. Event 1: Newton's First Law of Motion
Event 2: Newton's Third Law of Motion
B. Event 1: Newton's Third Law of Motion
Event 2: Newton's Second Law of Motion
C. Event 1: Newton's Third Law of Motion
Event 2: Newton's First Law of Motion
D. Event 1: Newton's First Law of Motion
Event 2: Newton's Second Law of Motion
An equation for a chemical reaction is shown below.
CH4 + 2O2 ⇒ CO2 + 2H2O
Which statements below are true about the chemical reaction?
Choose TWO correct answers.
There are 4 hydrogen atoms in the reactants and 2 hydrogen atoms in the products.
There are 4 oxygen atoms in the reactants and 4 oxygen atoms in the products.
The number of atoms of each element in the reactants is equal to the number of atoms of each element in the products.
There are more carbon atoms in the reactants than the products.
No new substances were produced during the chemical reaction.
Which of the following statements is true about the net force on the object in the diagram?
The vertical net force is 0 N; the horizontal net force is 65 N to the right.
The vertical net force is 0 N; the horizontal net force is 65 N to the left.
The vertical net force is 65 N to the left; the horizontal net force is 0 N.
The vertical net force is 65 N to the right; the horizontal net force is 0 N.
A student applied a force of 5 N to a ball with a mass of 12 kg and measured how far the ball rolled. The student wants to complete a second investigation, but he wants the ball to roll a shorter distance than the first investigation. Which actions would achieve the desired results? Choose TWO correct answers.
A. Roll a ball of the same mass as in the first investigation down a ramp with a force of 5 N.
B. Apply a 1 N force to a ball of the same mass as the first investigation.
C. Apply the same amount of force as in the first investigation to a 1 kg ball.
D. Apply a 20 N force to a ball of the same mass in the first investigation.
E. Use a 20 kg ball and apply the same amount of force as in the first investigation.
Four students designed and built air propelled rockets that were launched into the air. Their data are recorded in the table. Which rocket had the greatest acceleration?
A. Rocket 1
B. Rocket 2
C. Rocket 3
D. Rocket 4
A plastic tube is arranged on a lab tabletop as shown. A small sphere enters one end of the tube with enough speed to come out the other end of the tube. Which diagram shows where the sphere will go first when it leaves the tube?
Diagram A
Diagram B
Diagram C
Diagram D
An architect is calculating the net force of a ceiling fan attached to the ceiling of a classroom. She draws the following diagram of the fan and the forces acting on it. What is the force acting downward (in newtons) if the fan is not moving up or down because the forces are balanced.
0 N (zero)
440 N
Cannot be determined from the information given.
220 N
An unbalanced force of 32 newtons is shown acting on an 8.0-kilogram object. As long as the force acts on the object, the object will continue to move toward the east and its velocity will increase by (a) m/s every second. Based on this information, complete the sentence to predict the motion of the object. Enter your answer in the box. Do not enter the unit.
