PHYC 110(with solved solutions)
A vector cannot have zero magnitude if one of its components is not zero. correct answersWhich
of the following is an accurate statement?
a. The magnitude of a vector can be less than the magnitude of one of its components.
b. A vector cannot have zero magnitude if one of its components is not zero.
c. If the magnitude of vector A is less than the magnitude of vector B, then the x-component of A
is less than the x-component of B.
d. The magnitude of a vector can be positive or negative.
40 correct answersA cyclist cycles 40 km west and then 10 km north. What is the magnitude of
its displacement vector?
a. 20
b. 30
c. 40
d. 50
20 m/s correct answersIf a ball is thrown with a velocity of 25 m/s at an angle of 37 degrees
above the horizontal, what is the horizontal component of the velocity?
a. 15 m/s
b. 18 m/s
c. 20 m/s
d. 25 m/s
-1.25 x 10^6 correct answersA bullet moving horizontally with a speed of 500 m/s strikes a
sandbag and penetrates a distance of 10.0 cm. What is the average acceleration, in m/s2, of the
bullet?
a. -1.25x10^6
b. -2.50x10^6
c. -1.25x10^3
d. -2.50x10^3
70 m correct answersA ball is thrown downward from the top of a building with an initial speed
of 25 m/s. It strikes the ground after 2.0 s. How high is the building?
a. 20 m
, b. 30 m
c. 50 m
d. 70 m
1.8 x 10^2 m/s^2 correct answersWhat is the centripetal acceleration of a point on the perimeter
of a bicycle wheel of diameter 70cm when the bike is moving 8.0 m/s?
a. 91 m/s2
b. 1.8 x 10^2 m/s2
c. 2.1 x 10^2 m/s2
d. 2.7 x 10^2 m/s2
332 correct answersA student pulls a box of books on a smooth horizontal floor with a force of
100 N in a direction of 37.0 degree above the horizontal. If the mass of the box and the books is
40.0 kg, what is the normal force on the box?
a. 292 N
b. 312 N
c. 332 N
d. 392 N
5.0 correct answersSue and Sean are having a tug-of-war by pulling on opposite ends of a 5.0-kg
rope. Sue pulls with a 15-N force. What is Sean's force if the rope accelerates toward Sue at 2.0
m/s2?
a. 3.0 N
b. 5.0 N
c. 25 N
d. 50 N
0.47 correct answersA wooden block slides directly down an inclined plane, at a constant
velocity of 6.0 m/s. What is the coefficient of kinetic friction, if the plane makes an angle of
25degrees with the horizontal?
A vector cannot have zero magnitude if one of its components is not zero. correct answersWhich
of the following is an accurate statement?
a. The magnitude of a vector can be less than the magnitude of one of its components.
b. A vector cannot have zero magnitude if one of its components is not zero.
c. If the magnitude of vector A is less than the magnitude of vector B, then the x-component of A
is less than the x-component of B.
d. The magnitude of a vector can be positive or negative.
40 correct answersA cyclist cycles 40 km west and then 10 km north. What is the magnitude of
its displacement vector?
a. 20
b. 30
c. 40
d. 50
20 m/s correct answersIf a ball is thrown with a velocity of 25 m/s at an angle of 37 degrees
above the horizontal, what is the horizontal component of the velocity?
a. 15 m/s
b. 18 m/s
c. 20 m/s
d. 25 m/s
-1.25 x 10^6 correct answersA bullet moving horizontally with a speed of 500 m/s strikes a
sandbag and penetrates a distance of 10.0 cm. What is the average acceleration, in m/s2, of the
bullet?
a. -1.25x10^6
b. -2.50x10^6
c. -1.25x10^3
d. -2.50x10^3
70 m correct answersA ball is thrown downward from the top of a building with an initial speed
of 25 m/s. It strikes the ground after 2.0 s. How high is the building?
a. 20 m
, b. 30 m
c. 50 m
d. 70 m
1.8 x 10^2 m/s^2 correct answersWhat is the centripetal acceleration of a point on the perimeter
of a bicycle wheel of diameter 70cm when the bike is moving 8.0 m/s?
a. 91 m/s2
b. 1.8 x 10^2 m/s2
c. 2.1 x 10^2 m/s2
d. 2.7 x 10^2 m/s2
332 correct answersA student pulls a box of books on a smooth horizontal floor with a force of
100 N in a direction of 37.0 degree above the horizontal. If the mass of the box and the books is
40.0 kg, what is the normal force on the box?
a. 292 N
b. 312 N
c. 332 N
d. 392 N
5.0 correct answersSue and Sean are having a tug-of-war by pulling on opposite ends of a 5.0-kg
rope. Sue pulls with a 15-N force. What is Sean's force if the rope accelerates toward Sue at 2.0
m/s2?
a. 3.0 N
b. 5.0 N
c. 25 N
d. 50 N
0.47 correct answersA wooden block slides directly down an inclined plane, at a constant
velocity of 6.0 m/s. What is the coefficient of kinetic friction, if the plane makes an angle of
25degrees with the horizontal?
