Physics Quiz Momentum

Choose the correct answer for each question.

1 Which of the following has the largest momentum relative to earth? A tightrope walker crossing Niagara Falls A pickup truck speeding along a highway A Mack truck parked in a parking lot. The library A dog running down the street 2 A freight train rolls along a track with considerable momentum. It a second train rolls at the same speed but has twice as much mass, its momentum is: zero doubled quadrupled unchanged 3 A moving object on which no forces are acting will continue to move with a constant: acceleration impulse momentum all of the above none of the above 4 The difference between impulse and impact force invoves: distance the force acts time the force acts difference between acceleration and velocity mass and its effect on resisting a change in momentum 5 It is correct to say that impulse is equal to momentum the change in momentum the force on an object multiplied by the distance the object moves none of the above 6 Suppose a gun was made of a strong but very light material. Suppose also that the bullet is more massive than the gun itself. For such a weapon: the target would be safer than the shooter. recoil problems would be lessened conservation of momentum would not hold this gun would be more accurate than current guns 7 Two freshmen, Ted and Marcy are dropped from the roof of the school. Ned is twice as heavy as Marcy. Ignoring air friction, the reach the ground at the same time, but Ted has a greater: speed acceleration momentum all of the above none of the above 8 A bullet is fired from a gun. The speed of the bullet will be about the same as the speed of the recoiling gun because momentum is conserved because velocity is conserved if the mass of the bullet equals the mass of the gun none of the above 9 A 1000kg car travelling at 10 m/s brakes to a stop in 5 s. The average braking force is: 1000N 2000N 3000N 4000N Not enough information to determine. 10 A five kilogram fish swimming at a velocity of 1 m/s swallows an absent minded 1 kg fish at rest. The speed of the larger fish after lunch is: 1/2 m/s 2/5 m/s 5/6 m/s 1 m/s 2 m/s