A 53.5 kg crate is at rest at the bottom ofa rough incline, angled at B = 31 1)\" above the horizontal. _} To push the crate to the top of the incline, a worker exerts a force of FR horizontal to the incline. What is the sign of work done on the crate by the worker? 0 Negative 0 Zero 0 Positive What is the sign of work done on the crate by the surface? 0 Positive 0 Zero O Negative What is the sign of work done on the crate by gravity? 0 Negative 0 Positive 0 Zero You pull a 35.1 kg box a distance rn across a rough. horizontal surface. The rope you pull on is is angled in the direction B = 34.43\" above the horizontal. The tension in the rope has a magnitude of 63.0 N. The coefficient of friction between the box and the surface is DASH. The work done on the box by the tension force as you pull the box across the surface is 0 Positive 0 Zero 0 Negative The work done on the box by the normal force exerted on the box by the surface is O Negative 0 Positive 0 Zero The work done on the box by the gravitational force as you pull the box across the surface is O Negative 0 Zero G Positive A child that weighs 224 N has a kinetic energy of 20.1 ] as she runs. How fast is the child running? O 4.15 m/s O 1.33 m/s O0.179 m/5 O 1.76 m/sA block with a mass of 5.00 kg is dropped from a height of 1.00 m onto a vertical spring with a spring constant 3,300 Him as shown in the figure below. Once it hits the spring, the mass compresses the spring 0.174 m before coming to a stop. The work done on the block by the gravitational force as it falls is 0 Positive 0 Negative 0 Zero The work done on the block by the spring force as it comes to a stop is O Negative Cl Positive 0 Zero You push a box with a mass of 29.1 kg to the right across a rough horizontal surface. The force you apply to the box has a magnitude of 106 N and points in the direction 3 = 20'3\" below the horizontal. The box is initially at rest, but after you have pushed the box 2.D'| m. it is moving with a speed of 1.39 mfs. Which image below shows the nal state of the box described in the problem? You pull a box with a mass of 22.5 kg to the right across a rough horizontal surface. The tension in the rope as you pull on the box has a magnitude of 119 N and points in the direction 6' = 23.2\" above the horizontal. The box is initially at rest. but after you have pulled the box 2.08 m, it is moving with a speed of 1.67r mfs. Which image below shows the initial state of the box described in the problem? \fYou push a 22.? kg box a distance 9.00 m across a rough. horizontal surface. The foroe you exert on the box is angled in the direction El = 33.0\" above the horizontal and has a magnitude of 110 N. The coefcient of friction between the box and the surface is [L451]. The work clone on the box by your applied force as you push the box across the surface is O zero CI Negative CI Positive The work clone on the box by the normal force exerted on the box by the surface is O Negative CI Positive CI zero The work clone on the boa-t by the gravitational force as you push the box across the su rface is CI Zero O Negative CI Positive The work clone on the box by the force of kinetic friction exerted on the box by the surface is CI Positive CI Zero O Negative