Question 1

A 13.0-kg box starts at rest and slides 3.5 m down a ramp inclined at an angle of 10° with the horizontal.If there is no friction between the ramp surface and crate,what is the velocity of the crate at the bottom of the ramp? (g = 9.8 m/s2)

Accepted Answer

A)   11.91 m/s
B)   3.45 m/s
C)   8.28 m/s
D)   8.22 m/s
E)   ​68.6 m/s

Question 2

Is it possible for the total mechanical energy of a moving particle to be negative?

Accepted Answer

A)   No,because a moving particle has positive kinetic energy.
B)   No,because potential energy cannot have a value more negative than the value of the positive kinetic energy of the particle.
C)   Only if friction is involved.
D)   yes

Question 3

A 20.0-kg crate,initially at rest,slides down a ramp 2.0 m long and inclined at an angle of 20° with the horizontal.If there is no friction between ramp surface and crate,what is the kinetic energy of the crate at the bottom of the ramp? (g = 9.8 m/s2)

Accepted Answer

A)   368 J
B)   392 J
C)   268J
D)   134 J
E)   ​67 J

Question 4

A 50.0-kg (including the passenger) sled is subject to a net force of 10.0 N pushing in the direction of the sled's motion as it is moving over a horizontal surface for a distance of 10.0 m after having started from rest.At this point the sled is released as it starts down a 10.0° incline.However,the snow is not very deep,and the sled stops after having moved an additional 25.0 m.What is the work done by friction while the sled is on the incline?

Accepted Answer

A)   -2170.6 J
B)   -2270.6 J
C)   -2070.6 J
D)   -12410.1 J
E)   ​-12210.1 J

Exam 5: Energy

A 13.0-kg box starts at rest and slides 3.5 m down a ramp inclined at an angle of 10° with the horizontal.If there is no friction between the ramp surface and crate,what is the velocity of the crate at the bottom of the ramp? (g = 9.8 m/s²)

Correct Answer
verified

Is it possible for the total mechanical energy of a moving particle to be negative?

Correct Answer
verified

A 20.0-kg crate,initially at rest,slides down a ramp 2.0 m long and inclined at an angle of 20° with the horizontal.If there is no friction between ramp surface and crate,what is the kinetic energy of the crate at the bottom of the ramp? (g = 9.8 m/s²)

Correct Answer
verified

Correct Answer
verified

Exam 5: Energy

A 13.0-kg box starts at rest and slides 3.5 m down a ramp inclined at an angle of 10° with the horizontal.If there is no friction between the ramp surface and crate,what is the velocity of the crate at the bottom of the ramp? (g = 9.8 m/s2)

Correct AnswerverifiedShow Answer

Is it possible for the total mechanical energy of a moving particle to be negative?

Correct AnswerverifiedShow Answer

A 20.0-kg crate,initially at rest,slides down a ramp 2.0 m long and inclined at an angle of 20° with the horizontal.If there is no friction between ramp surface and crate,what is the kinetic energy of the crate at the bottom of the ramp? (g = 9.8 m/s2)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A 13.0-kg box starts at rest and slides 3.5 m down a ramp inclined at an angle of 10° with the horizontal.If there is no friction between the ramp surface and crate,what is the velocity of the crate at the bottom of the ramp? (g = 9.8 m/s²)

Correct Answer
verified

Correct Answer
verified

A 20.0-kg crate,initially at rest,slides down a ramp 2.0 m long and inclined at an angle of 20° with the horizontal.If there is no friction between ramp surface and crate,what is the kinetic energy of the crate at the bottom of the ramp? (g = 9.8 m/s²)

Correct Answer
verified

Correct Answer
verified