PHYSICS 112- MIDTERM EXAM
QUESTIONS AND ANSWERS RATED
A+ FOR SUCCESS
reproducible - ANSWER-The scientific methods relies on making _______ observation
and experiments
energy - ANSWER-the ability to do work or cause change
applied research - ANSWER-Scientists engage in ___________ to acquire knowledge
aimed at specific commercial or industrial goals/problems
distance or position - ANSWER-an object is in motion if its _________ from a reference
point is changing
speed - ANSWER-if a toy car moving at 10 cm/s passes a toy car moving at 10 cm/s in
the opposite direction, both cars have the same ________
Velocity contains information about the direction of motion while speed does not. -
ANSWER-What is the difference between speed and velocity
3 - ANSWER-The quantity 2.67 x 10^3 has how many significant figures
Meters, kilograms - ANSWER-The basic SI units for length and mass are
points to the left - ANSWER-if sam walks 100 m to the right and then 200 m to the left,
his net displacement vector
in the same direction as displacement vectors - ANSWER-velocity vectors point
B - ANSWER-Which of the following statements would be true of the scientific method?
(a) The scientific method is a linear process starting with observation and following
several other, rigidly defined steps.
(b) The scientific method is a continuous process by which people learn about the
physical universe and share their knowledge with others.
(c) Scientists may report findings in such a way that experiments and observations
remain known only to the original experimenters.
B - ANSWER-While foraging for food, a seal dove straight down in the ocean off the
shore of Alaska and reached a depth of 0.30 km in 5.0 min. What was the speed of the
seal as it made this dive?
, (a) 0.60 m/s (b) 1.0 m/s
(c) 1.6 m/s (d) 6.0 m/s
D - ANSWER-A vector is a quantity that has:
(a) magnitude. (b) direction.
(c) either magnitude or direction. (d) both magnitude and direction.
B - ANSWER-What is the difference between speed and velocity?
(a) Speed includes direction and velocity does not.
(b) Velocity includes direction and speed does not.
(c) Speed is a vector and velocity is not.
(d) Speed and velocity are the same thing.
B - ANSWER-After a student walks 1.0 mi west and then 1.0 mi north, how far is she
from her starting point?
(a) 1.0 mi (b) 1.4 mi
(c) 1.6 mi (d) 2.0 mi
C - ANSWER-A bird flies 3.0 km due west and then 2.0 km due north. What is the
magnitude of the bird's displacement?
(a) 2.0 km (b) 3.0 km
(c) 3.6 km (d) 5.0 km
B - ANSWER-Compute 3.24 m + 0.532 m to the correct number of significant figures.
(a) 3.7 m (b) 3.77 m
(c) 3.772 m (d) 3.7720 m
D - ANSWER-The earth formed 4.57 x 109 years ago. What is this time in seconds?
(a) 1.67 x 1012 s (b) 4.01 x 1013 s
(c) 2.40 x 1015 s (d) 1.44 x 1017 s
D - ANSWER-The following options describe the motion of four cars (A thru D). Which
car has the largest acceleration?
(a) goes from 0 to10 m/s in 5.0 s. (b) goes from 0 to 5.0 m/s in 2.0 s.
(c) goes from 0 to 20 m/s in 7.0 s. (d) goes from 0 to 3.0 m/s in 1.0 s.
B - ANSWER-Starting from rest, a car takes 2.4 s to travel 15 m. Assuming constant
acceleration, how long will it take the car to travel the next 15 m?
(a) 0.67 s (b) 1.0 s
(c) 1.8 s (d) 3.6 s
C - ANSWER-The slope at a point on a position-versus-time graph for an object is the:
(a) object's speed at that point (b) object's average velocity at that point
(c) object's instantaneous velocity at that point. (d) object's acceleration at that point.
D - ANSWER-Which of the following is an example of uniform motion?
QUESTIONS AND ANSWERS RATED
A+ FOR SUCCESS
reproducible - ANSWER-The scientific methods relies on making _______ observation
and experiments
energy - ANSWER-the ability to do work or cause change
applied research - ANSWER-Scientists engage in ___________ to acquire knowledge
aimed at specific commercial or industrial goals/problems
distance or position - ANSWER-an object is in motion if its _________ from a reference
point is changing
speed - ANSWER-if a toy car moving at 10 cm/s passes a toy car moving at 10 cm/s in
the opposite direction, both cars have the same ________
Velocity contains information about the direction of motion while speed does not. -
ANSWER-What is the difference between speed and velocity
3 - ANSWER-The quantity 2.67 x 10^3 has how many significant figures
Meters, kilograms - ANSWER-The basic SI units for length and mass are
points to the left - ANSWER-if sam walks 100 m to the right and then 200 m to the left,
his net displacement vector
in the same direction as displacement vectors - ANSWER-velocity vectors point
B - ANSWER-Which of the following statements would be true of the scientific method?
(a) The scientific method is a linear process starting with observation and following
several other, rigidly defined steps.
(b) The scientific method is a continuous process by which people learn about the
physical universe and share their knowledge with others.
(c) Scientists may report findings in such a way that experiments and observations
remain known only to the original experimenters.
B - ANSWER-While foraging for food, a seal dove straight down in the ocean off the
shore of Alaska and reached a depth of 0.30 km in 5.0 min. What was the speed of the
seal as it made this dive?
, (a) 0.60 m/s (b) 1.0 m/s
(c) 1.6 m/s (d) 6.0 m/s
D - ANSWER-A vector is a quantity that has:
(a) magnitude. (b) direction.
(c) either magnitude or direction. (d) both magnitude and direction.
B - ANSWER-What is the difference between speed and velocity?
(a) Speed includes direction and velocity does not.
(b) Velocity includes direction and speed does not.
(c) Speed is a vector and velocity is not.
(d) Speed and velocity are the same thing.
B - ANSWER-After a student walks 1.0 mi west and then 1.0 mi north, how far is she
from her starting point?
(a) 1.0 mi (b) 1.4 mi
(c) 1.6 mi (d) 2.0 mi
C - ANSWER-A bird flies 3.0 km due west and then 2.0 km due north. What is the
magnitude of the bird's displacement?
(a) 2.0 km (b) 3.0 km
(c) 3.6 km (d) 5.0 km
B - ANSWER-Compute 3.24 m + 0.532 m to the correct number of significant figures.
(a) 3.7 m (b) 3.77 m
(c) 3.772 m (d) 3.7720 m
D - ANSWER-The earth formed 4.57 x 109 years ago. What is this time in seconds?
(a) 1.67 x 1012 s (b) 4.01 x 1013 s
(c) 2.40 x 1015 s (d) 1.44 x 1017 s
D - ANSWER-The following options describe the motion of four cars (A thru D). Which
car has the largest acceleration?
(a) goes from 0 to10 m/s in 5.0 s. (b) goes from 0 to 5.0 m/s in 2.0 s.
(c) goes from 0 to 20 m/s in 7.0 s. (d) goes from 0 to 3.0 m/s in 1.0 s.
B - ANSWER-Starting from rest, a car takes 2.4 s to travel 15 m. Assuming constant
acceleration, how long will it take the car to travel the next 15 m?
(a) 0.67 s (b) 1.0 s
(c) 1.8 s (d) 3.6 s
C - ANSWER-The slope at a point on a position-versus-time graph for an object is the:
(a) object's speed at that point (b) object's average velocity at that point
(c) object's instantaneous velocity at that point. (d) object's acceleration at that point.
D - ANSWER-Which of the following is an example of uniform motion?
