Year 9 - Physics - 30-1-15

Thai Sikh International School

E-Learning Programme – Online Assignment –   30/01/2015

Name :                                                                                         Subject :Physics 

Year   :  9                                                                                     Schedule No. : 6

Answer the following:  ( refer page nos: 42 and 43 of your text book).

  1.     Assume that g= 10N/kg, and there is no air resistance. Two rocks of 5kg and 10 kg are falling near the earth’s surface.

a). What is the weight of each rock?.

b). What is the acceleration of each rock?.      

c). What is the gravitational field strength?.   

  2.     Explain how the weight of the bodies change but mass remains unchanged. 

  3.     A rocket of mass 200 kg has an upward force of 3000 N from its engine, what is its acceleration.  

  4.     What is Gravitational force?. What are its main features?.