14. According toNewtonâs _____ law, an object with no netforce acting on itremains at rest
or in motion with a constant velocity.
A. Third
B. Fourth
C. Second
D. First
(for this question I related it to the concept of newtonsfirstlaw)
15. Newtonâs second law of motion states that
A. the acceleration of anobject is a ratio of the net force overits mass
B.forces always act in pairs
C. for every action there is an equal but opposite reaction
D. the inertia of an object is inversely proportional totheobjectâs mass
(for this I supposed thatthat the equation f=ma for newtons secondlaw could be expressed asa=f/m) 16. A block of dry iceweighing 1960 N is lying on a walkway. Thecoeffi cient of frictionof
the walking surface is 0.125. With what force must you push orpullthe block to move it?
A. 1.57 x 104 N
B. 1960 N
C. 245 N
D. 6.38 x 10-5 N
(For this I multiplyed 1960N(which is the Fn or fg) by thecoefficient of friction on thewalking surface which is 0.125)
17. Two masses areconnected by a string and pulled along africtionless surface byanother
string to which a tension of 40.0 N is applied. The magnitude ofthesystemâs acceleration
is
A. 8.0 m/s2
B. 20 m/s2
C. 13 m/s2
D. 2.7 m/s2
(For this question I added the two masses to get the mass and thenIused the equation a=f/m to find theacceleration) 18. An elevator thatweighs 3.5 x 103 N is acceleratedupward at 1.0m/s2. What force does the cable exert togive it thisacceleration?
A. 357 N
B. 0 N
C. 3500 N
D. 3857 N
(For this quesion I wasreally confused and I guessed that the forceof tension in thecable was what the cable weighed )
19. The acceleration dueto gravity on the Moon is 1/6 of that onEarth. The weight of a 10kg
mass on the Moon is
A. 98 N
B. 60 N
C. 16 N
D. 1.7N
(For this question I divided9.81 by 6 and the multiplyed this by10)
20. According toNewtonâs law of universal gravitation, theforce ofattraction between any
two masses is related directly to the
A. velocity of the two masses
B. product of the two masses
C. distance between themasses D. sum of the masses
( I wasnt sure for thisquestion so I had to guess)
or in motion with a constant velocity.
A. Third
B. Fourth
C. Second
D. First
(for this question I related it to the concept of newtonsfirstlaw)
15. Newtonâs second law of motion states that
A. the acceleration of anobject is a ratio of the net force overits mass
B.forces always act in pairs
C. for every action there is an equal but opposite reaction
D. the inertia of an object is inversely proportional totheobjectâs mass
(for this I supposed thatthat the equation f=ma for newtons secondlaw could be expressed asa=f/m)
16. A block of dry iceweighing 1960 N is lying on a walkway. Thecoeffi cient of frictionof
the walking surface is 0.125. With what force must you push orpullthe block to move it?
A. 1.57 x 104 N
B. 1960 N
C. 245 N
D. 6.38 x 10-5 N
(For this I multiplyed 1960N(which is the Fn or fg) by thecoefficient of friction on thewalking surface which is 0.125)
string to which a tension of 40.0 N is applied. The magnitude ofthesystemâs acceleration
is
A. 8.0 m/s2
B. 20 m/s2
C. 13 m/s2
D. 2.7 m/s2
(For this question I added the two masses to get the mass and thenIused the equation a=f/m to find theacceleration)
18. An elevator thatweighs 3.5 x 103 N is acceleratedupward at 1.0m/s2. What force does the cable exert togive it thisacceleration?
A. 357 N
B. 0 N
C. 3500 N
D. 3857 N
(For this quesion I wasreally confused and I guessed that the forceof tension in thecable was what the cable weighed )
19. The acceleration dueto gravity on the Moon is 1/6 of that onEarth. The weight of a 10kg
mass on the Moon is
A. 98 N
B. 60 N
C. 16 N
D. 1.7N
(For this question I divided9.81 by 6 and the multiplyed this by10)
two masses is related directly to the
A. velocity of the two masses
B. product of the two masses
C. distance between themasses
( I wasnt sure for thisquestion so I had to guess)
