LAWS OF MOTION (PEN PAPER TEST) IX
THIS TEST CONTAINS 7 NUMBER OF QUESTIONS EACH OF MARK 5. TOTAL MARKS OF THE TEST IS 35 AND REQUIRED TIME IS 1 HOUR 30 MINUTES. YOU CAN WRITE THE ANSWER IN A PAPER. AFTER COMPLETION OF TEST WITHIN THE GIVEN TIME, TAKE IMAGE OF YOUR ANSWER AND CONVERT IT IN PDF FILE (NOT IN FOLDER) AND UPLOAD THE FILE BEFORE FINISH THE TEST. FOR THIS PURPOSE YOU WILL GET 10 MINUTES EXTRA. THEREFORE TOTAL TIME OF YOUR TEST IS 1 HOUR 40 MINUTES. ALL THE PROCESS YOU HAVE TO COMPLETE WITH IN THE GIVEN TIME. THEN CLICK ‘FINISH QUIZ’ BUTTON. RESULT PAGE WILL COME AND YOU CAN DOWNLOAD THE DERIVED ANSWER OF THIS TEST WITH QUESTION PAPER BY CLICK THE LINK ON RESULT PAGE. YOUR COPY WILL BE EVALUATED AND WILL BE POSTED ON YOUR REGISTERED EMAIL.
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- LAWS OF MOTION IX (P.P.T.) 0%
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Question 1 of 7
1. Question
5 point(s)1. State Newton’s 2nd law and prove it. Define 1 N force. Derive the relation between SI and C.G.S. unit of force.   (3+1+1)
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Question 2 of 7
2. Question
5 point(s)2. A ball of mass 200 g strikes the wall with speed 10 ms-1 and renounces with speed 5 ms-1. If the collision time is 0.1 s then calculate force acting on the wall. Driver of a car observes a wall at a distance d when his speed is v. What he will do to prevent accident either apply brake or rotate the car. Explain. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (3+2)
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Question 3 of 7
3. Question
5 point(s)3. Define inertia. Why passenger of a car moves forward when the brake is applied? Which one is easier; to pull a roller or push it, explain. Define impulsive force. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (1+1+2+1)
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Question 4 of 7
4. Question
5 point(s)4. Two blocks of mass m and M are connected by a string and force F is applied on m. What is the tension on the string? Show that Newton’s
law is the special case of 2nd law. (3+2)
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Question 5 of 7
5. Question
5 point(s)5. A body of mass 5 kg is applied by force P. At time t = 0 s, velocity v = 2 ms-1 and at t = 12 s, v = 8 ms-1. Plot v versus t graph and calculate P from it. When a man is on a chair can’t pull it up. Explain the reason. (3+2)
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Question 6 of 7
6. Question
5 point(s)6. State and prove conservation of linear momentum. A ball of mass 0.5 Kg is moving with 2 ms-1 and after travelling a distance of 10 m the speed is 12 ms-1. What is the force is applied on the body? (3+2)
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Question 7 of 7
7. Question
5 point(s)7. A rocket ejected fuel at a rate 25 kgs-1 with speed 100 ms-1. What is the thrust exerted by rocket. A lift is moving downward with acceleration a and a man of mass M is inside the lift. What is the force exerted by lift on man? (2+3)
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