Q1: What is the main diffe re nce be twe e n a ve ctor and a scalar?
A: Sca la r pro vide s info rm a tio n a bo ut o nly siz e , while ve lo city pro vide s info rm a tio n a bo ut siz e a nd dire ctio n.
Q2: Ve locity is an e xample of a _____.
A: Ve cto r
Q3: What is the formula for spe e d?
A: Spe e d = dista nce /tim e [s=d/t]
Ve lo city = displa ce m e nt/tim e [v=d/t]
Q4: If a pe rson walks 25 me te rs to the North, the n 10 me te rs to the S outh, and the n 7 me te rs to the North, what is the ir displace me nt? (with units).
A: 22 m e te rs to the No rth
Q5: A rocke t ship starts from re st and turns on its forward booste r rocke ts, will be the ve locity of the rocke t ship?
A: 12m /s

Q6: What axis is labe le d “Position” in a Position vs. Time graph?
A: T he Y -a xis is la be le d "Po sitio n" o r so m e tim e s "Dista nce " in a Po sitio n vs. T im e gra ph.
Q7: A horiz ontal slope me ans that an obje cts motion is _____.
A: Sta tio na ry
Q8: The slope of a Position vs. Time graph re pre se nts the _____ of the obje ct.
A: Spe e d
Q9:
Image File Name : img-1567700561663pf38887.png
If the line s in the following graph re pre se nt an obje ct on a Position vs. Time graph, which obje ct is moving more quickly?
A: Line B
Q10 :

Image File Name : img-1567700988384pf15892.png
The following Position vs. Time graph re pre se nts the motion of a spide r. What is the ave rage ve locity of the S pide r be twe e n t = 4s and t = 10s?
A: 0.5 m /s
Q11: This force oppose s the motion of two obje cts sliding against one anothe r.
A: Frictio n
Q12: Give an e xample of a contact force and an e xample of a non-contact force .
A: C o nta ct: a pplie d, spring, dra g (a ir re sista nce ), frictio n, no rm a l, buo ya nt.
No n-co nta ct: m a gne tic, e le ctric, gra vity, stro ng nucle a r, we a k nucle a r.
Q13: This force doe s not occur in the vacuum of space but doe s occur on ce le stial bodie s in space to varying de gre e s.
A: Gra vity

Q14: Why doe s a pe rson’s hand hurt afte r slapping some one in the face ?
A: Fo rce s a lwa ys a ct in pa irs a cco rding to Ne wto n's 3rd La w o f Mo tio n. Whe n the ha nd a pplie s a fo rce to the fa ce , the fa ce in re turn a pplie s a fo rce to the ha nd. T his is why a pe rso n's ha nd m ight sting a fte rwa rd.
Q15: would be the calculate d force on an obje ct due to gravity if that obje ct has a we ight of 5kg?
A: Ne wto n's 2nd La w o f Mo tio n sta te s tha t the fo rce a pplie d by a n o bje ct ca n be ca lcula te d by m ultiplying the o bje cts m a ss by its a cce le ra tio n [F=m a ]. T he fo rce ca use d by gra vity wo uld be 50N.
Q16: Ne wton’s first law of motion state s _____
A: An o bje ct a t re st will re m a in a t re st a nd a n o bje ct in m o tio n will re m a in in m o tio n unle ss a n o utside fro ce a cts upo n it.
Q17: Ne wtons third law of motion state s _____
A: Fo r a ctio n, the re is a n o ppo site a nd e qua l re a ctio n.
Q18: Ne wton’s first law is some time s re fe rre d to as the Law of Ine rtia. A 0.5kg
grape and a 3 kg wate rme lon are both pushe d by winds with a force of
40N. What obje ct has more ine rtia and why?
A: T he wa te rm e lo n ha s m o re ine rtia be ca use it ha s a gre a te r re sista nce to cha nge in m o tio n.
Q19: Using ne wton’s se cond law of motion, what is the force of a brick falling on the ground if its mass is 2kg and its acce le ration is 5 m/s²
A: F=m a
2

Q20 : You and a frie nd are de cide to hang a tire from a branch using rope .
Gravity is pulling down on the tire , but the rope is holding the tire up.
What is the type of "e qual and opposite force " to gravity de scribe d by
Ne wton's Third Law that is causing the ne t force on the tire to e qual 0N?
A: Fo rce te nsio n
Q21: The combination of all force s acting on an obje ct is re fe rre d to _____.
A: Ne t fo rce
Q22: If two force s act on an obje ct in the same dire ction, the ne t force is the
______ of the two force s.
A: Sum
Q23:
Image File Name : img-1567705952628pf80544.png
Which dire ction is the ne t force for e ach of the following?
A: Right
Le ft

Right
No ne
Q24: Explain how an obje ct that is not acce le rating or de ce le rating can have force s acting on it.
A: If the fo rce s o n a n o bje ct a re ba la nce d, the o bje ct will no t be a cce le ra ting o r de ce le ra ting. T his o bje ct will still ho we ve r ha ve fo rce s a cting o n it, the ir ne t fo rce is just e qua l to z e ro .
Q25: A kid hangs a tire swing from a tre e using a rope . The force from the rope on the tire is 4N and the gravity on the tire is 6N. What is the ne t force on the tire ?
A: 2N do wnwa rd
Q26: This scie ntist contribute d so much to the worlds unde rstanding of physics that he has a unit and four laws in his name .
A: Isa a c Ne wto n
Q27: A pe rson is flying on airplane and looks out a window and se e s the ground moving. In this case , the ground se rve s as a _____.
A: Fra m e o f re fe re nce
Q28:
A: Ne wto ns (N)
Q29: What ve ctor cause s a pe rson’s body shift to the le ft whe n a car is turning right?
A: Acce le ra tio n cha nge s due to the cha nge in the ca rs dire ctio n. T his sudde n

cha nge in a cce le ra tio n ca use s a pe ro n's bo dy to shift in the o ppo site dire ctio n.
Q30 : A pe rson hits a cue ball with a pool stick. The cue ball the n hits anothe r pool ball, but the pool ball come s to a stop be fore going into a pocke t.
What force s are at play in this sce nario?
A: Applie d fo rce , frictio n, no rm a l fo rce , gra vity