MCQ
force-motion-simple-machines-l2 MCQ - Practice Questions with Answers
Solve 30 force-motion-simple-machines-l2 questions for RAS/RPSC preparation.
Practice questions
Q1Which option names only non-contact forces from the REET force list?
Magnetic and gravitational forces can show effects without ordinary physical contact. The distractors mix in muscular force or friction, both of which are contact forces in the Class 6-8 classification.
Q2In a classroom activity, Devika marks a fixed line on the floor. A toy car is at the line at 0 seconds and 2 metres away from it after 4 seconds. Which idea proves that the toy car is in motion?
Motion is identified by comparing position with a reference point over time. The fixed line is the reference point, and the toy car's distance from it changes; wheels, size and material are not the deciding criteria.
Q3Asha presses a sharp drawing pin and a blunt coin on clay with nearly equal effort. Which result is most likely?
The sharp pin concentrates the same effort on a smaller contact area, so pressure is greater and the clay mark is deeper. This is the same reasoning used for nails and sharp knives.
Q4Maryam says a broad schoolbag strap feels more comfortable than a narrow string. Which explanation is correct?
The bag’s weight is still there, but a wider strap spreads the force over more shoulder area. Karan’s clay activity shows the same idea: concentrated force makes a deeper mark, spread force gives lower pressure.
Q5Consider the statements about friction. Statement I: Friction always helps motion by pushing objects forward. Statement II: Friction can help us walk, write with a pencil and stop a bicycle.
Friction is a contact force that opposes motion or attempted motion between surfaces. It can still be useful: our feet grip the ground while walking, pencil marks form on paper, and bicycle brakes slow the wheel.
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More questions
6Which option correctly classifies the force when a magnet attracts iron pins without touching them?
7A teacher wants students to notice useful friction, not only friction as a problem. Which pair is most suitable for this point?
8Match the classroom object with the simple-machine idea: 1. ramp, 2. well pulley, 3. tongs.
9A teacher presses the flat side and then the thin edge of the same ruler on clay with equal force. The thin edge makes a deeper mark. Which conclusion is correct?
10Imran pulls the free end of a rope downward, and a bucket tied to the other end moves upward over a wheel. Which idea about a pulley is shown?
11Which force in the RBSE list acts between surfaces and opposes sliding motion?
12Which pair is correctly matched for type of motion?
13Karan presses the same wooden block on wet clay first with its broad face and then with its narrow edge, using nearly the same force. Which statement best explains the deeper mark made by the narrow edge?
14A teacher asks Asha to move a heavy carton from the floor to a low platform. She uses a smooth sloping plank instead of lifting it straight up. Which simple-machine idea is shown?
15Imran cycles 600 metres in 120 seconds. What is his speed?