4. A crate of mass 15 kg is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 100N parallel to the incline, which makes an angle of 20° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 5.00m. (a) How much work is done by gravity? (b) How much energy is lost due to friction? (c) How much work is done by the 150N force? (d) What is the speed of the crate after being pulled 5.00m?

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Chapter7: Work, Energy, And Energy Resources
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ii. answer #4

II.
Solve the following problems carefully. Write the STEP-BY-STEP solution and
box your final answer.
1. Multiply the Following Vectors using cross Product method. W = i x
F = ( 5i + 3j – 8 k) N
* = (2i – 4j – 5k) m
2. If a particles velocity is given by the expression v(t) = 3.4t3 – 5.4t, What is the
position of the particle after 5 seconds if it starts at rest?
3. A gas in a cubical container with side equal to 0.3568 m has a pressure of 0.24 MPa
at 24°C. If the gas constant is equal to 212. Compute the following, a. Density of
, b. Mass of the gas in lbm, c. Weight of the gas in N.
kg-K'
the gas in
4. A crate of mass 15 kg is pulled up a rough incline with an initial speed of 1.5 m/s.
The pulling force is 100N parallel to the incline, which makes an angle of 20° with
the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled
5.00m.
(a) How much work is done by gravity?
(b) How much energy is lost due to friction?
(c) How much work is done by the 150N force?
(d) What is the speed of the crate after being pulled 5.00m?
Transcribed Image Text:II. Solve the following problems carefully. Write the STEP-BY-STEP solution and box your final answer. 1. Multiply the Following Vectors using cross Product method. W = i x F = ( 5i + 3j – 8 k) N * = (2i – 4j – 5k) m 2. If a particles velocity is given by the expression v(t) = 3.4t3 – 5.4t, What is the position of the particle after 5 seconds if it starts at rest? 3. A gas in a cubical container with side equal to 0.3568 m has a pressure of 0.24 MPa at 24°C. If the gas constant is equal to 212. Compute the following, a. Density of , b. Mass of the gas in lbm, c. Weight of the gas in N. kg-K' the gas in 4. A crate of mass 15 kg is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 100N parallel to the incline, which makes an angle of 20° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 5.00m. (a) How much work is done by gravity? (b) How much energy is lost due to friction? (c) How much work is done by the 150N force? (d) What is the speed of the crate after being pulled 5.00m?
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