Practice Question A stationary car starts to drive up a 50.0 m ramp, which is tilted upward at 25° from the horizontal. The car's acceleration is constant until it reaches the end of the ramp. It takes the car 5.00 s to go from the base of the ramp to the edge. 3. a. Calculate the work done by this car, in Joules. There should be two distinct parts to this calculation. Your answer will contain a mass variable, so it is fine to leave the answer as an algebraic equation. Show Transcribed Text

A learner with a mass of 60kg runs up a flight of stairs in 5 seconds.The height of the stairs is 300cm.a. Is work a vector or scalar quantity?b. Calculate the work done by the learner.

a) The acceleration of a 5.0 kg box is 2.5 ms?. when a horizontal force is applied across a surface having a coefficient of friction of 0.5, as shown in Figure 3. a = 2.5 ms-2 7 kg Hk = 0.5 Figure 3 Find the work done over a distance of 25 cm by ix. the horizontal force the frictional force, and Х. xi. the net force. xi. what is the change in kinetic energy of the box?

Suppose a force of 60 N is required to stretch and hold a spring 0.1 m from its equilibrium position. a. Assuming the spring obeys Hooke's law, find the spring constant k. b. How much work is required to compress the spring 0.6 m from its equilibrium position? c. How much work is required to stretch the spring 0.2 m from its equilibrium position? d. How much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. k= (Type an integer or a decimal.) b. Set up the integral that gives the work done in compressing the spring 0.6 m from its equilibrium position. Use decreasing limits of integration. (Type exact answers.) Find the work done in compressing the spring. The work is (Type an integer or a decimal.) c. Set up the integral that gives the work done in stretching the spring 0.2 m from its equilibrium position. Use increasing limits of integration. dx (Type exact answers.) Find the work done in stretching the spring. The…