A physics demonstration includes golf balls placed on top of paper tubes resting on a cookie sheet that is sitting on three glass beakers filled with water.  A force is applied to the cookie sheet that causes it to accelerate forward (to the left in this picture), off the beakers.  The golf balls resting on the paper tubes fall down into the beakers filled with water while the paper tubes move with the cookie sheet and do not land in the beakers.  Choose the best explanation for this observation.

Q: A paratrooper and his 8-m-diameter parachute weigh 950 N. Taking the average air density to be 1.2…

A:

Q: A 13 g bullet pierces a sand bag 32 cm thick. If the initial velocity of the bullet was 68 m/s and…

A: Given data:  Mass (m) = 13 g = 0.013 kg Displacement (d) = 32 cm = 0.32 m Initial velocity (Vi) = 68…

Q: Two blocks are positioned on surfaces, each inclined at the same angle of 47.2 degrees with respect…

A: Answer             (2) 11.57Kg Solution

Q: Karen is driving on the 210 freeway in her 3,500 kg Escalade when she sees Hayley driving a Tesla on…

A: This is a problem of motion in a circular curve. In this case, Karen's tires must exert a frictional…

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”