Question

Q-5)

Part I

A cannon fires a cannonball. Which of the objects has the largest magnitude momentum after being shot? Assume all external forces are negligible

Multiple Choice

A-The cannon has the larger momentum

B- Both have the same magnitude momentum

C- The ball has the greater momentum

Part II

According to Newton's First Law

Multiple Choice

A- once an object is in motion a force cannot change its velocity.

B- If an object is in motion, it will always eventually slow down and come to rest.

C-a force is necessary to cause an object to leave its state of rest are state of uniform motion

Part III

With magnets

Multiple Choice

A- like poles repel one another.

B - like poles attract one another.

C- unlike poles repel one another.

Q6)

A man pushes very hard for several seconds upon a heavy rock, but the rock does not budge. What sign is the work done on the rock by the man?

Multiple Choice

• positive

• negative

• none, the work done on the rock is equal to zero

Q9)

Materials that allow electric charges to move freely are called

Multiple Choice

• conductors.

• insulators.

Answer 1