Objective questions based on work, energy, power

Assignment Help Physics

Reference no: EM1313360

Q1. A worker pushes a wheelbarrow with a force of 40 N over a level distance of 6.0 m. If a frictional force of 24 N acts on the wheelbarrow in a direction opposite to that of the worker, what net work is done on the wheelbarrow?

A. 240 J
B. 216 J
C.144 J
D. 96 J
E. 75 J

Q2. Which of the following is an example of a non conservative force?

A. gravity
B. magnetism
C. friction
D. Both choices A & B are valid.
E. Both choices A & C are valid.

Q3. An amount of work equal to 1.5 J is required to compress the spring in a spring-gun. What is the "launch speed" of a 15-g marble?

A. 14 m/s
B. 15 m/s
C. 18 m/s
E. 21 m/s
F. e. 23 m/s

Q4. Lonnie pitches a baseball of mass 0.20 kg. The ball arrives at home plate with a speed of 40 m/s & is batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for 0.050 s, what is the impulse experienced by the ball?

A. 360 Ns
B. 20 Ns
C. 400 Ns
D. 9.0 Ns
E. 35 Ns

Q5. A 0.30-m-radius automobile tire rotates how many rad after starting from rest & accelerating at a constant 2.0 rad/s2 over a 5.0-s interval?

A. 12.5 rad
B. 25 rad
C. 2.0 rad
D. 0.50 rad
E. 0.25 rad

Reference no: EM1313360

Questions Cloud

Five competitive forces has the most significant impact : In general conclude which of the five competitive forces has the most significant impact on approach.

Make a cash budget for rotor products : Prepare a cash budget for Rotor Products, Inc. for the second quarter of 2006, based on the following information. The marketing department has provided you with the following sales estimates.

Explanation of law of comparative advantage : The law of comparative advantage recommends that countries specialize in those products in which they have a comparative advantage, not an absolute advantage.

Management on the results of operations : Make a brief comment to management on the results of operations. What recommendations would you make to management to improve prfitability?

Objective questions based on work, energy, power : Objective questions based on work, energy, power.

Number of professors visited during the earlier week : Every Saturday morning he requires his sales staff to send him a report. This report Comprises, among other thing, the number of professors visited during the earlier week.

Standard error of the average or median : A chance sample of 50 families revealed an average or median of $112,000 and a standard deviation of $40,000. What is the standard error of the average or median?

Suppose a horse pullson a rope with a force of 7800 n : A crate of 48.0 tools rests on a horizontal floor. You exert the gradually increasing horizontal push on it and observe that the crate just begins to move while your force exceeds 344. After that you must reduce your push to 260 to keep it moving at ..

Calculation of net present value of a project with annuity : Calculation of net present value of a project with annuity and What is the project's NPV

User Account

All Pages