please answer these 4 questions about since I know nothing about this.
1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done?
A. 0.040 j
B.9 j
C.14 j
D.25 j
2.to chop wood you apply 50.0n of force to an ax. The ax applies 600.0n of force to the wood. What is the mechanical advantage of the ax?
A. 650.0
B. 8.3
C. 12.0
D. 0.0833
3.you do 185 j of work pulling a cart up a ramp. if the ramp does 153 j of work, what is the efficiency of the ramp?
A. 82.7 percent
B. 121.0 percent
C. 32.0 percent
D. 338.0 percent
4.remy noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform his tricks. How did the oil help??
A. the oil reduced friction between the moving parts of the skateboard.
B. the oil increased friction between the moving parts of the skateboard
C. the oil reduced friction between the skateboard wheels and the ground.
D. The oil increased friction between the skateboard wheels and the ground.
1. B
2.C
3.A
4.A
5.D
i just took the test i am being 100% honest and Help!! is right thank you help!!
Oh come on, take some guesses. At least try #2 and #4
ok b AND d for 2 and 4
is number four d.
Thanks Help!!! Is 100% correct
1. To find the work done, we use the formula: work = force x distance. In this case, the force is the weight of the box, which is 15N, and the distance is 0.60m. Multiplying these values together gives us the work done, which is 15N x 0.60m = 9 J. Therefore, the answer to question 1 is B. 9 J.
2. To calculate mechanical advantage, we use the formula: mechanical advantage = output force / input force. In this case, the output force is 600.0N and the input force is 50.0N. Dividing the output force by the input force gives us the mechanical advantage, which is 600.0N / 50.0N = 12. Therefore, the answer to question 2 is C. 12.0.
3. Efficiency is calculated using the formula: efficiency = (useful work / total work) x 100%. In this case, the useful work is 185 J and the total work is 153 J. Dividing the useful work by the total work and multiplying by 100% gives us the efficiency, which is (185 J / 153 J) x 100% = 121.0%. Therefore, the answer to question 3 is B. 121.0 percent.
4. The oil helps reduce friction between the moving parts of the skateboard. Friction is a force that opposes motion, so by reducing friction, the oil makes it easier for the skateboard wheels to rotate smoothly. This allows for less resistance and an easier ability to reach the necessary speeds for performing tricks. Therefore, the answer to question 4 is A. The oil reduced friction between the moving parts of the skateboard.