2) an air hockey puck with a mass of 1 kg is traveling to the right at2 m/s. a second air hockey puck with a mass of 1 kg is traveling to the left at 4 m/s . they collide head-on. after the collision, the first puck is traveling to the left at 3 m/s and the second puck is traveling to the right at 1 m/s. which of the following is true regarding the collision?
a) the collision was perfectly elastic
b) the collision was somewhat elastic, but not perfectly.
c) the collision was inelastic.
d) momentum was not conserved in the collision.
e) this collision could not happen-its violates the law of physics.
3. in an experiment, those variables that are under the direct control of the scientist are referred to as,
a) department variables. b) data c) independent variables. d) controls. e)facts.
4. a 6-kg cart accelerates at a rate of 3m/s2 for a time of 2 seconds. by what amount does the momentum of this cart increase?
a. 1kg m/s b. 9kg m/s c. 36kg m/s d. 12kgm/s e.6kg m/s
5.a cart on wheels is rolling up a long ramp. if it starts out with a speed of 7m/s at the bottom of the ramp, and reaches the top of the ramp with a speed of 1m/s, and had a uniform acceleration of -4m/s2 then what is the length of the ramp
a.2m b.12m c.4m d.48m e.6m
6) a wagon is rolling down a hil with a uniform acceleration how far will the wagon travel in 3s if it starts out with a velocity of 3m/s and ends up with a velocity of 11m/s?
a. 63m b.42m c.33m d.37m e.21m
a) the collision was perfectly elastic
b) the collision was somewhat elastic, but not perfectly.
c) the collision was inelastic.
d) momentum was not conserved in the collision.
e) this collision could not happen-its violates the law of physics.
3. in an experiment, those variables that are under the direct control of the scientist are referred to as,
a) department variables. b) data c) independent variables. d) controls. e)facts.
4. a 6-kg cart accelerates at a rate of 3m/s2 for a time of 2 seconds. by what amount does the momentum of this cart increase?
a. 1kg m/s b. 9kg m/s c. 36kg m/s d. 12kgm/s e.6kg m/s
5.a cart on wheels is rolling up a long ramp. if it starts out with a speed of 7m/s at the bottom of the ramp, and reaches the top of the ramp with a speed of 1m/s, and had a uniform acceleration of -4m/s2 then what is the length of the ramp
a.2m b.12m c.4m d.48m e.6m
6) a wagon is rolling down a hil with a uniform acceleration how far will the wagon travel in 3s if it starts out with a velocity of 3m/s and ends up with a velocity of 11m/s?
a. 63m b.42m c.33m d.37m e.21m