Q1. Which of the given comprises the biggest momentum relative to the earth?
a) Pickup truck speeding all along a highway.
b) The science building on the campus.
c) A tightrope walker crossing the Niagara falls.
d) A dog running down the street.
e) A Mack truck parked in the parking lot.
Q2. A rifle re-coils while firing a bullet. The speed of rifle’s recoil is small since:
a) Rifle has much more mass than bullet.
b) Momentum of rifle is smaller.
c) Momentum is mostly concentrated in the bullet.
d) The force against the rifle is smaller than against bullet.
Q3. In order to catch a ball, a baseball player extends the hand forward before the impact with ball and then lets it ride backward in the direction of ball’s motion…Doing this decreases the force of impact on player’s hand principally since the:
a) Time of impact is raised.
b) Time of impact is reduced.
c) Relative velocity is less.
d) Force of impact is decreased.
e) None of these
Q4. Padded dashboards in cars are safer in an accident that the non-padded ones since of occupant hitting the dash consist of:
a) Raised time of impact
b) Raised momentum
c) Reduced impulse
d) Reduced time of impact
Q5. A 4 kg ball consists of momentum of 12kg m/s. what is ball’s speed?
a) 4m/s
b) 48 m/s
c) 3 m/s
d) 12 m/s
e) None of these