physics, please solve question 3 Q1: If A=41-6 and B = 21 +10 then the vector C=2Ã-B has a magnitude of:a) 7.2b) 42c) 23d) 64Q2: A block of mass 0.3 kg is dropped from rest at a height 2 m directly above the top of a vertical springhaving a force constant 100 N/m. The maximum compressed distance (in m) of the spring isa) 0.44b) 0.22c) 0.63d) 0.38Q3: Two vectors lying in the xy plane are given by the equations A=51-21 and B-21-31. AxB equals:a) -19kb) 11kc) 19kB=d) -11kQ4: A stone is thrown vertically upward with an initial speed of 14 m/s. It will rise to a maximum height(in m) of:a) 13.1b) 9.8c) 39.2d) 19.4Q5: The area under a velocity-time graph represents:a) speedb) change in acceleration c) change in velocityd) displacementQ6: An elevator has a mass of 1600 kg and is carrying 200 kg passengers. A constant friction force of 4000N retards its motion upward. What power delivered by the motor (in W) is required to lift the elevator at aconstant speed of 4 m/s?a) 4.33*10*b) 2.73*104c) 8.80*104d) 3.53*10*Q7: In a given displacement of a particle, its kinetic energy increases by 25 J while its potential energydecreases by 10J. determine the work of the nonconservative forces acting on the particle during thisdisplacement.a)-15Jb) 10 Jc) 15 Jd) -40 JQ8: A football player shot the ball at an angle of 40° above the horizontal at a speed of 8 m/s. How far (inm) will the ball reach in the horizontal direction?a) 22.6b) 14.5c) 9.8d) 6.300

The given vector A →= 5i^ - 2j^B→ = 2i^ - 3j^

Q3: Two vectors lying in the xy plane are given by the equations A=51-21 and B-21-31. AxB equals: a) - 19k b) 11k c) 19k Q4: A stone is thrown vertically upward with an initial spood of 11 d) -1 - 11k

Q3: Two vectors lying in the xy plane are given by the equations A=51-21 and B-21-31. AxB equals: a) - 19k b) 11k c) 19k Q4: A stone is thrown vertically upward with an initial spood of 11 d) -1 - 11k

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter11: Collisions

Section: Chapter Questions

Problem 22PQ: In a laboratory experiment, 1 a block of mass M is placed on a frictionless table at the end of a...

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Scalars and Vectors

Scalars and Vectors are the classification of physical quantities that are used to denote various terms in physics.

Question

physics, please solve question 3

Q1: If A=41-6 and B = 21 +10 then the vector C=2Ã-B has a magnitude of:
a) 7.2
b) 42
c) 23
d) 64
Q2: A block of mass 0.3 kg is dropped from rest at a height 2 m directly above the top of a vertical spring
having a force constant 100 N/m. The maximum compressed distance (in m) of the spring is
a) 0.44
b) 0.22
c) 0.63
d) 0.38
Q3: Two vectors lying in the xy plane are given by the equations A=51-21 and B-21-31. AxB equals:
a) -19k
b) 11k
c) 19k
B=
d) -11k
Q4: A stone is thrown vertically upward with an initial speed of 14 m/s. It will rise to a maximum height
(in m) of:
a) 13.1
b) 9.8
c) 39.2
d) 19.4
Q5: The area under a velocity-time graph represents:
a) speed
b) change in acceleration c) change in velocity
d) displacement
Q6: An elevator has a mass of 1600 kg and is carrying 200 kg passengers. A constant friction force of 4000
N retards its motion upward. What power delivered by the motor (in W) is required to lift the elevator at a
constant speed of 4 m/s?
a) 4.33*10*
b) 2.73*104
c) 8.80*104
d) 3.53*10*
Q7: In a given displacement of a particle, its kinetic energy increases by 25 J while its potential energy
decreases by 10J. determine the work of the nonconservative forces acting on the particle during this
displacement.
a)-15J
b) 10 J
c) 15 J
d) -40 J
Q8: A football player shot the ball at an angle of 40° above the horizontal at a speed of 8 m/s. How far (in
m) will the ball reach in the horizontal direction?
a) 22.6
b) 14.5
c) 9.8
d) 6.3
00

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