UPTET 2019 | Mostly Asked Force And Motions Questions | 25th December 2019

UPTET 2019 Exam Important Science Questions:

Today, we are providing you the Science Questions, which help you to command over this subjects.Taught many interesting science information and add some fun in a science teaching-learning process.This section is not only important for CTET 2019 Exam i.e UPTETREETHTET etc. So, we will provide you the questions which will help you in preparing for Exam.

Q1. ____________ is an example for non-contact force
_____ गैर-संपर्क बल का एक उदाहरण है.
(a) Magnetic force/ चुंबकीय बल
(b) Frictional force/ घर्षण बल
(c) Rolling ball/ रोलिंग गेंद
(d) None/ कोई नहीं

Q2. Force changes __________ of an object
बल किसी वस्तु का __________ बदलता है
(a) Volume/ आयतन
(b) Speed/ गति
(c) Density/ घनत्व
(d) None/ कोई नहीं

Q3. Why a goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal?
फुटबॉल के खेल में जब गेंद से गोल किया जाता है तो गोलकीपर गेंद को पकड़ते समय अपने हाथों को पीछे की ओर क्यों खींचता है?
(a) Keep the ball in hands firmly/ हाथों में गेंद को मजबूती से रखने के लिए
(b) Reduce the force exerted by the ball/ गेंद के बल को कम करने के लिए
(c) To exert larger force on the ball/ गेंद पर ज्यादा बल लगाने के लिए
(d) None of these/ इनमें से कोई नहीं

Q4. A boy of mass 50 Kg running at 5 m/s jumps on to a 20Kg trolley travelling in the same direction at 1.5 m/s. What is the common velocity?
5 m/s की गति से भागता हुआ 50 किलो द्रव्यमान का एक लड़का 1.5 m/s  की गति से उसी दिशा में जाती हुई 20किलो की एक ट्राली पर कूदता है. इनका सामान्य वेग क्या होगा?
(a) 4 m/s
(b) 3 m/s
(c) 3.5 m/s
(d) None of the above/ इनमें से कोई नहीं

Q5. A person is standing in a bus. When the bus starts moving forward suddenly ___________
एक व्यक्ति बस में खड़ा है. जब बस अचानक आगे बढ़ती है तो ___________
(a) The person moves forward/ व्यक्ति आगे की ओर गिरता है
(b) The person remains stationary/ व्यक्ति स्थिर रहता है
(c) The person is unaffected/ व्यक्ति अप्रभावित रहता है
(d) The person moves backward/ व्यक्ति पीछे की ओर गिरता है

Q6. When we shake the branch of a tree, its’ fruits and dry leaves fall down. This is an example of ___________
जब हम किसी पेड़ की शाखा को हिलाते हैं, तो उसके फल और सूखे पत्ते नीचे गिर जाते हैं. यह ___________ का एक उदाहरण है
(a) Inertia of motion/ गति का जड़त्व
(b) Inertia of rest/ विराम का जड़त्व
(c) Inertia of direction/ दिशा का जड़त्व
(d) Newton’s third law of motion/ न्यूटन का गति का तीसरा नियम

Q7. The driver of a car suddenly sees a broad wall in front of him. What he should do?
गाड़ी का ड्राइवर अचानक अपने सामने एक चौड़ी दीवार देखता है. उसे क्या करना चाहिए?
(a) Brake sharply/ तेजी से ब्रेक लागनी चाहिए
(b) Turn sharply/ तेजी से मुड़ना चाहिए
(c) Keep going/ चलते रहना चाहिए
(d) Jump out of the car/ कार से बाहर कूदना चाहिए

Q8. A dog is chasing a hare and the hare runs in a zigzag path. What happens?
एक कुत्ता एक खरगोश का पीछा कर रहा है और खरगोश टेढ़े-मेढ़े रास्ते पर दौड़ता है. इससे क्या होगा?
(a) The dig becomes confused/ कुत्ता भ्रमित हो जाएगा
(b) The dog catches the hare easily/ कुत्ता आसानी से खरगोश को पकड़ लेगा
(c) It becomes difficult for the dog to catch the hare/ कुत्ते के लिए खरगोश को पकड़ना मुश्किल होगा
(d) The hare dies/ खरगोश मर जाएगा

Q9.  When a moving bus suddenly stops, a person sitting ___________
जब एक चलती बस अचानक रुक जाती है, तो एक बैठा हुआ व्यक्ति ___________ 
(a) Stands up/ खड़ा हो जाता है
(b) Falls forward/ आगे की ओर गिरता है
(c) Falls backward/ पीछे की ओर गिरता है
(d) Is unaffected/ अप्रभावित रहता है

Q10. If a body has more mass, it had more inertia.
यदि किसी शरीर में अधिक द्रव्यमान है, तो उसमें अधिक जड़ता होती है.
(a) True/ सही
(b) False/ गलत
(c) Cannot defined/ परिभाषित नहीं किया जा सकता
(d) None of these/ इनमें से कोई नहीं


S1.Ans. (a)
Sol. The forces experienced by bodies even without being physically touched are called the non-contact forces or the forces at a distance.
Examples of non-contact forces: Gravitational Force, Electrostatic force, Magnetic force

S2.Ans. (b)
Sol. The action from a force can cause an object to move or speed up (accelerate), to slow down (decelerate), to stop, or to change direction.

S3.Ans. (b)
Sol. The goalkeeper pulls his hands backwards after holding the ball to decrease the rate of change of momentum by increasing the time. By doing this, less force is exerted on his hands as force is directly proportional to the rate of change of momentum.

S5.Ans. (d)
Sol. A person standing in a bus moves backward when the bus moves forward. When the bus moves forward, the lower part of his body begins to move along with the bus while the upper part of his body continues to remain at rest due to inertia. That is why a person falls backward when the bus starts.

S6.Ans. (b)
Sol.  On shaking, the branch comes into motion while the dry fruits and leaves tend to remain at rest, inertia at rest, and so get separated. Thus the falling of leaves and fruits when the branch is shaken is an example of inertia of rest.

S8.Ans. (c)
Sol. When the hare runs in a zigzag path, it becomes difficult for the dog to catch the hare. This is because the dog has more mass and hence has more inertia of direction than that of the hare.

S9.Ans. (b)
Sol.  As the bus stops, the lower part of the person’s body comes to rest along with the bus while the upper part of his body continues to remain in motion due to inertia and therefore the person falls forward.

S10.Ans. (a)
Sol. Mass of the body is the measure of its inertia. If a body has more mass, it is more difficult to change its state of rest or of uniform motion.


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