A= 2 B= 3 C= 7 A student pulls a (25.0+A) kg box a distance of...

A= 2

B= 3

C= 7

A student pulls a (25.0+A) kg box a distance of (4.50 + B) m up a ramp set at 25.8 degrees using a force of (154 + C) N applied parallel to the ramp. Find the efficiency of the ramp. Give your answer in percent (%) and with 3 significant figures.

Expert Solution

genius_generous answered 2 years ago

1. A student pulls horizontally on a 12 kg box, which then moves horizontally with an...

1. A student pulls horizontally on a 12 kg box, which then moves horizontally with an acceleration of 0.2 m/s2. If the student uses a force of 15 N, what is the coefficient of kinetic friction of the floor? 2. A 30 kg block slides down a 20° ramp with an acceleration of 1.2 m/s2. What is the coefficient of kinetic friction between the block and the ramp? 3. For a given velocity of projection in a projectile motion, the...

A person pulls a 11-kg toboggan for a distance of 3.5 m on a horizontal sheet...

A person pulls a 11-kg toboggan for a distance of 3.5 m on a horizontal sheet of ice (frictionless) with a rope directed 25.0º above the horizontal snowy surface. The tension in the rope is 88 N. There is also a zephyr (soft gentle breeze) in the opposite direction of the motion applying a 11.0 N force. (a) How much net work is done on the toboggan by ALL the forces acting on it? (b) If the toboggan starts from...

A box of textbooks of mass 25.0 kg rests on a loading ramp that makes an...

A box of textbooks of mass 25.0 kg rests on a loading ramp that makes an angle α with the horizontal. The coefficient of kinetic friction is 0.23 and the coefficient of static friction is 0.36. A) As the angle α is increased, find the minimum angle at which the box starts to slip. Express your answer using two significant figures. B) At this angle, find the acceleration once the box has begun to move. Express your answer using two...

Three rotating masses A = 7 kg, B = 12 kg, and C = 11 kg,...

Three rotating masses A = 7 kg, B = 12 kg, and C = 11 kg, are attached to a shaft with their centres of gravity at 25 mm, 55 mm and 35 mm respectively from the shaft axis. The angular positions of B and C from A are respectively 90o and 150o measured in the same direction. The distance between the planes of rotation of A and B is 1.75 m and between B and C is 2 m...

Find the value of a : b : c : d, if a : b = 2 : 3, b : c = 4 : 5 and c : d = 6 : 7.

(8%) Problem 3: A 0.275-kg aluminum bowl holding 0.65 kg of soup at 25.0°C is placed...

(8%) Problem 3: A 0.275-kg aluminum bowl holding 0.65 kg of soup at 25.0°C is placed in a freezer.What is the final temperature, in degrees Celsius, if 377 kJ of energy is transferred from the bowl and soup, assuming the soup’s thermal properties are the same as that of water? Specifically, you can assume the latent heat of fusion for the soup is 334 kJ/kg.

Find the distance from (2, −7, 7) to each of the following. (a) the xy-plane (b)...

Find the distance from (2, −7, 7) to each of the following. (a) the xy-plane (b) the yz-plane (c) the xz-plane (d) the x-axis (e) the y-axis (f) the z-axis

a box of mass m = 66.0 kg (initially at rest) is pushed a distance d...

a box of mass m = 66.0 kg (initially at rest) is pushed a distance d = 54.0 m across a rough warehouse floor by an applied force of FA = 218 N directed at an angle of 30.0° below the horizontal. The coefficient of kinetic friction between the floor and the box is 0.100. Determine the following. (For parts (a) through (d), give your answer to the nearest multiple of 10.) * I already solved parts b and c...

A 54-kg box is being pushed a distance of 7.1 m across the floor by a...

A 54-kg box is being pushed a distance of 7.1 m across the floor by a force Upper POverscript right-arrow EndScripts ? whose magnitude is 188 N. The force Upper POverscript right-arrow EndScripts ? is parallel to the displacement of the box. The coefficient of kinetic friction is 0.23. Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work...

3. Explain/define briefly the concepts of: a. De minimis b. Amber box subsidies c. Blue Box...

3. Explain/define briefly the concepts of: a. De minimis b. Amber box subsidies c. Blue Box subsidies d. Green Box subsidies Please dont take it from a website. The lecturere will use plagiarism checker

Question