1 A 0.10-kilogram model rocketís
engine is designed to deliver an impulse
of 6.0 newton seconds. If the rocket engine burns for 0.75 second,
average force does it produce?
(1) 4.5 N
(3) 45 N
(2) 8.0 N (4) 80. N
Base your answers to questions 12
and 13 on the information and diagram
below. The diagram shows a compressed spring between two carts
rest on a horizontal frictionless surface. Cart A has a
mass of 2 kilograms and
cart B has a mass of 1 kilogram. A string holds the carts
2 What occurs when the string is
cut and the carts move apart?
(1) The magnitude of the
acceleration of cart A is one-half the
magnitude of the acceleration of cart B.
(2) The length of time that the force acts on cart A is
length of time the force acts on cart B.
(3) The magnitude of the force exerted on cart A is
magnitude of the force exerted on cart B.
(4) The magnitude of the impulse applied to cart A is twice
magnitude of the impulse applied to cart B.
3 After the string is cut and the
two carts move apart, the magnitude of
which quantity is the same for both carts?
(4) kinetic energy
4 An object moving at a constant
speed of 25 meters per second possesses
450 joules of kinetic energy. What is the objectís mass?
(1) 0.72 kg (3) 18
(2) 1.4 kg (4) 36 kg
5 The diagram below shows a moving,
5.00-kilogram cart at the foot of a hill
10.0 meters high. For the cart to reach the top of the hill, what
is the minimum
kinetic energy of the cart in the position shown? [Neglect energy
loss due to