An external force ?⃗ moves a 2.50-kg box at a constant speed ? up a frictionless ramp, as shown in the figure. The force acts in a direction parallel to the ramp. Calculate the work ? done on the box by this force as it is pushed up the 5.00-m ramp to a height ℎ=3.00 m. How does the work done on the box compare to the change in gravitational potential energy Δ?grav that the box undergoes as it rises to its final height?

A sled of 50 kg mass moves along a smooth horizontal surface at 7 m/s. The sled encounters a rough spot that exerts a force of -90 Nt on the sled.  Calculate: a) What is the acceleration of the sled? b) Calculate how much work is done by the frictional force on the sled if the patch is 15 m in length. c) What is the sled's final velocity as it leaves the rough spot?

A man claiming a mountain carrying a bag with mass 7.5 kg , after 30 min he reach 8.2 m height from the start point. 1-calculate the work done from the man to the bag ? 2- if the man has weight 645 N , what is the work done while he carrying same bag ? 3-what is the energy difference between the man and the bag ?

1. Refer to figure 1. The 10.0 kg green cart travels down a ramp - from point A to B. Calculate its starting potential energy, kinetic energy at the bottom of the ramp, and its velocity coming off the bottom of the ramp. If the cart coasts from points B to C, did it do any work? How far up the 2nd ramp does the cart go as measured from the ground? 10.0m Figure 1 B

A child pulls a box of toys using a steady force of 10. N at an angle 60o from the horizontal. How much work is done by the child after the box moves with a distance of 4.0 m horizontally?

The spring in the above figure has a spring constant of K = 140 N/m. A 150 g block is placed against the spring which is then compress to 16 cm. A) When the block is released, how high up the slope does it rise? B) What is the kinetic energy at the highest point? C) What is the potential energy at the highest point?

a) Calculate the work done when a 5.0 kg bag of apples is lifted 1.2 off the ground.  b) If this bag of apples is carried at this height to the checkout counter, is any work done? Justify your choice.  c) Calculate the power developed when the action of lifting the apples takes 2.0 s.

cience PhysicsQ&A LibraryThe spring shown in the figure is compressed 80.0 cm and is used to launch a 82kg. physics student along a frictionless track, Given values are K= 85000 Nm and Height = 11m.   Now consider the track as frictionless until it starts up the 32degree incline, and then friction kicks in.    a) If the student only makes it 45.0m up the incline, how much work was done by friction?   b) What was the coefficient of friction on the ramp? The spring shown in the figure is compressed 80.0 cm and is used to launch a 82kg. physics student along a frictionless track, Given values are K= 85000 Nm and Height = 11m.   Now consider the track as frictionless until it starts up the 32degree incline, and then friction kicks in.    a) If the student only makes it 45.0m up the incline, how much work was done by friction?   b) What was the coefficient of friction on the ramp?   close Get live help whenever you need from online tutors!Try bartleby tutor…

A 65.0-kg file cabinet of is sliding down a rough ramp for a distance of 5.00 m as shown. The friction force on the box is 75.0 N. During this process, what is the work done on the cabinet by the friction force, in Joule? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

D An 100.0000-kg man who pushes a crate 3.0000 m up along a ramp that makes an angle of 20° with the horizontal (see figure). He exerts a force of 500.0000 N on the crate parallel to the ramp and moves at a constant speed. (a) Calculate the work done by the man against his own weight to get up the ramp. W J man mg (b) Calculate the work done by the man on the crate to get it up the ramp. W % (c) Calculate the total work done to get both the man and the crate up the ramp. Wtotal J man→ crate = 10 Search = see other options - If you don't want to answer the question right now T Submit Answer J- & J+ U * 90 8 Answering the question(s) helps us recommend your next activity. 144 ( 9 f10 ▷ll O ( DDI P L D = } ↑ ( backspac