DURATION: 3 HRS General Instructions: SUBJECT-SCIENCE CLASS-IX - This question paper consists of thirty nine questions. - Attempt all the questions. Internal choice has been given in some questions. SECTION-A: PHYSICS (27 Marks) M.M.- 1. The Fig. shows how the speed of a marble changes as it rolls on an inclined plane A, trav flat horizontal surface and then on another inclined plane B. Speed (ms)- B 0 10 20 30 40 50 60 70 80 90 100 Time (s)-> Then the total distance travelled by the marble under 50 seconds is (i) 800 m (ii) 900 m (iii) 1000 m (iv) 1300 m 2. An obiect of mass 2 ko is sliding with a constant velocity of 4 m/s on a frictionless boris​

1. A marble rolled off of a 1-m high tabletop with an initial horizontal velocity of 10 m/s.a) Determine its final velocity.b) How much time will it take for the marble to hit the floor?c) How far will the ball head forward before reaching the floor?2. A ball is hurled from a horizontal ground with a speed of 45 m/s at an angle of 35 0 from thehorizontal.a) What is the final horizontal velocity of the ball after 3.5 seconds?b) How much time will it take for it to reach its highest point?c) How much time will it take for it to reach the ground?d) What is the maximum height reached by the ball?e) What is the maximum horizontal distance covered by the ball?

A ball starting from rest accelerates uniformly at 5.0 meters per second2 as it rolls 40.0 meters down an incline. How much time is required for the ball to roll the 40.0 meters?A 2.8 sB 4.0 sC 8.0 sD 16 s

4. A ball bearing rolls with constant velocity on a tabletop 0.950 m high. It rolls off and hits theground 0.35m from the edge of the table. How fast was the ball rolling?

Consider a collision between two marbles . A 100 g marble moving right at 5.4 m/s strikes a 14 g marble at rest. After the collision, if the 14 g marble moves forward with speed 1.2 m/s, what is the speed, in m/s, of 100 g marble immediately after the collision?

A snowboarder with a mass of 57 kg starts from rest at the top of africtionless slop at a height of45 m. She follows the frictionless path shownin figure. Calculate her speed at the second peak?