PDF chapter test TRY NOW

Look the image and answer the following questions:
 
1.
 
shopping-cart-1080836_640.jpg
 
a) What kind of friction in the above image?
b) The friction in the image is lesser than
 
2.
 
playground-2250661_1280.jpg
 
a) What kind of friction can be seen in the above image?
b) The friction in the image is lesser than