CBSE ADDA

CBSE ADDA Q. 1.  When the passenger m oving in a bus , the road side trees appear to b e moving ---------------------------------- (a) Back ward (b)For ward Q. 2.  In uniform motion the object covers ------------ (a) equel distance (b) un equal distance Q. 3.  Where objects cover un equal distances in equal interval of time then the motion is called ---------------- (a) uniform motion (b) non uniform motion Q. 4.  The average speed = =A car accelerate = (a) Total time taken /total distance traveled (b) Total distance traveled/total time taken Q. 5.  v = (a) t/s (b) s/t Q. 6.  An object travels 16m in 4sec and another 16 m in 2 sec. what is the average speed of the object----------- (a) 5.33 ms-1 (b) 5. 34 ms-1 Q. 7.  If we specify , its direction of motion along with its speed , the quantity that specifies with the aspects is called------------- (a) velocity (b) motion Q. 8.  Automobiles are fitted with a device that show the distance traveled . such a device is known ---------- (a)

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Q.1: The largest cell in the human body is - (a)Nerve cell  (b) Muscle cell (c)Liver cell (d)Kidney cell Q.2: The barrier between the protoplasm and the other environment in  an   animal cells - (a)Cell wall (b) Nuclear membrane (c) Tonoplast  (d)   Plasma membrane Q.3: The term ‘Cell’ was given by - (a)Leeuwenhoek ( b) Robert hooke  (c) Flemming (d) Robert Brown Q.4: Who proposed the cell theory? - (a) Schleiden and Schwann  (b) Watson and Crick (c) Darwin and Wallace (d) Mendel and Morgan Q.5: A plant cell differs from an animal cell in the absence of - (a)Endoplasmic Reticulum (b) Mitochondria (c) Ribosome  (d) Centrioles Q.6: Centrosome is found in - (a)Cytoplasm  (b) Nucleus (c) Chromosomes (d)   Nucleolus Q.7: The power house of a cell is - (a)Chloroplast  (b) Mitochondrion  (c) Golgi apparatus (d) Nucleolus Q.8: Within a cell the si

CBSE ADDA Q. 1. How much force is needed to accelerate a trolley of mass 20g through 1 m/s2? Q. 2. A force of 100N acts on a mass of 25 kg for 5 s .What velocity does it generate? Q. 3. A bullet leaves a rifle with a velocity of 100m/s and the rifle of mass 2.5 kg recoils with a velocity of 1m/s. Find the mass of the bullet? Q. 4. A certain force acting on a mass of 15kg for 3s, gives it a velocity of 2m/s. Find the magnitude of force? Q. 5. A cricket ball of mass 0.15 kg is moving with a velocity of 1.2m/s . Find the impulse on the ball and average force applied by the player if he is able to stop the ball in 0.18s? Q. 6. A motor car of mass 200kg is moving with a certain velocity . It is brought to rest by the application of brakes, within a distance o f 20m when the average resistance being offered to it is 500N.What was the velocity of the motor car? Q. 7. A body of mass 0.5kg undergoes a change of velocity of 4cm/s in 4s What is the force acting on it? Q. 8. A force of 8N

CBSE ADDA  Numericals On Motion Q.1: An athlete completes one round of circular track of diameter 200 m in 40 sec. What will be the distance covered and the displacement at the end of 2 minutes 20 sec? (  2200 m , 200 m) Q.2: Joseph jogs from one end A to another end B of a straight 300 m road in 2 minutes and 30 sec and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph’s average speeds and velocities in jogging (a) from A to B (b) from A to C? ( 2 ms ‑1 , 1.90 ms -1 , 0.952ms -1  ) Q.3. Abdul while driving to school computes the average speed for his trip to be 20 kmh -1 . On his return trip along the same route, there is less traffic and the average speed is 30 kmh -1 . What is the average speed of Abul’s trip? (24 kmh -1  ) Q.4: A motor boat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 ms -2 for 8.0 s. How far does the boat travel during this time? (96 m.) Q.5: A driver of a car travelling a