Exam Three Final

Question 1

A box with mass M is released from rust from a compressed spring on a frictionless surface with a height, H from the ground. The spring has a spring, constant K and was initially compressed by a distance of X from its natural length before the release. Find the boxes, velocity magnitude when it falls off the table and hits the ground

a) v=square root 2gh
B)v=xsquare root k divided by m
C)v=xsquare root k divided by 2m
D)v=square root go plus k divided by m times x^2
E)v=square root 2gh plus kdivjded by m times. ^2

Answer 1

V=square root 2gh plus k divided m x^2

Question 2

Which of the following has the largest magnitude of momentum?
A) M equals one KG with V equals 1.5
B) M equals two KG with V equals 0.5
C) M equals 0.5 KG with V equals two
D) M equals 1.5 KG with V equals 0.5
E) M equals one KG with V equals 1 m/s i plus 0.5 m/scj

Answer 2

A) M equals one KG with V equals 1.5

Question 3

An object with mass M equals five KG moves with an initial velocity of V equals -2 m/s after a bounces back from the wall. It has a velocity of V equals 0.3 m/s neglecting the gravitational force here what is the impulse the wall excerpts on the object when they interact.
A) j=1.5
B) J equals 11.5
C) J equals -11.5
D) J equals 10
E) J equals -10

Answer 3

B)j equals 11.5

Question 4

A ball of mass M equals 10 KG is moving with a velocity of V equals one is split into two parts one piece with mass M equals three KG move with a velocity of V equals -2. What is the velocity of the other piece?

a) V equals -2.8
B) V equals -1.5
C) V equals 2.3
D) V equals 3.4
E) V equals 4.2

Answer 4

C) v equals 2.3

Question 5

A great white shark of mass M coasting through the water in a nearly frictionless way at speed and golf, La tuna of mass M equals M divided by, three traveling the same distance at the speed where V2 is less than version one swallowing it in one bite what is the speed after it’s tasty meal

A) V equals V2
B) V equals V one
C) V equals (2V one plus V2) divided by three
D ) V equals( 3V1plus V2) divided by four
E) V equals(2V one plus 3V2) divided by five

Answer 5

D ) V equals( 3V1plus V2) divided by four

Question 6

Two balls collide with each other elastically one has a mass M1 and moves with a velocity V1 equals two ball two has mass two equals 2M and moves with a velocity V2 equals negative V what are the velocities of the two balls after the collision?
A) V one equals negative V ; V2 equals 2V
B) V one equals negative -2V ; V2 equals V
C) V one equals equals negative V divided by two; V2 equals V
D) V one equals negative V; V2 equals V divided by two
E) V one equals -5÷3; V2 equals V divided by three

Answer 6

B) v1=-2 ;v2=v

Question 7

Five balls with equal mass form a W in the XY plane their corresponding(-2,1),(-1,-1),(0,0.8),(1,-1),(2,1) find the center of the mass for the system

A) (0,-0.24)
B)(0,0)
C)(0,0.16)
D)(0,0.4)
E)(0.2,0.4)

Answer 7

C)(0,0.16)

Question 8

A car accelerates from rest to V equals 30 m/s in 10 seconds. The tires have a radius of R equals 0.5 m. What is the angular acceleration of the tires?

a) a=3
B)a=6
C)a=9
D)a=12
E)a=18

Answer 8

B)a=6

Question 9

A centerifuge in a medical laboratory rotates at an angular speed of 5400 RPM one switched off it rotates 100 revolutions before coming to arrest find the magnitude of the constant angular acceleration of centerifuge Wallace slows down to a stop
A) a= 0
B)a=18 pi
C)a=36 pi
D)a=54pi
E)a=81pi

Answer 9

E=81 pi

Question 10

A turntable is initially at rest. It starts rotating with a constant angular acceleration of a equals 3 for 5 seconds and then starts to slow down with an angular acceleration of a equals negative one until it stops. How many radiance does the turntable rotate for the entire process
A ) theta =50
B) theta =75
C) theta =100
D) theta =120
E) theta =150

Answer 10

E) theta=150