Which of the following is a unit of linear momentum?
A. kgm/s/s
B. kgm.m/s/s
C. kgm
D. kgm/s
To minimize the force of impact during collisions of cars, which of the following may be practically done?
A. increase collision time by introducing crumple zones
B. decrease collision time by making the bumpers more rigid
C. make the cars go faster so nobody has to suffer
D. decrease collision time by minimizing friction on the road
This quantity is a product of force and time of contact.
A. momentum
B. impulse
C. impact force
D. kinetic energy
which of the following is not a characteristic of elastic collisions?
A. conserved kinetic energy
B. conserved momentum
C. deformation during collision
D. complete decoupling after collision of two bodies
In the game of egg catch, what can you do to decrease the force of impact as you catch the egg?
A. make your hand meet the egg to make a quick catch
B. move your hand in the direction of the egg motion to increase time of impact
C. keep you hand steady while catching to make sure you catch the egg
D. use a brick to catch the egg
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