pls complete this if u can..
1.) If a motorboat travels 25 km/hr down a river that has a velocity of 4 km/hr, what is the boats actual velocity?
a. 21 km/hr
b. 29 km/hr
c. 100 km/hr
d. 6.2 km/hr
2.) The rate of change of velocity called____
a. speed.
b. motion.
c.momentum
d. acceleration
3.) A distance-time graph is a straight line for
a. constant speed.
b. acceleration
c. momentum.
d. speed
4.) An object traveling in a circular motion is constantly changing
a.speed
b.mass
c.distance
d.direction
Pls people help. =]
2007-02-16 09:51:17 · 6 answers · asked by love<3 3 in Science & Mathematics ➔ Physics
1) B
2) D
3) A
4) D
2007-02-16 10:01:16 · answer #1 · answered by TK_M 5 · 0⤊ 0⤋
1) because the boat is traveling in the same direction as the current. Both velocities add up to 25km/hr, the current is 4km/hr, therefore the boat's velocity is 21km/hr
2) acceleration is the rate of changing velocity over time
3) distance/time graph shows speed
4) direction
2007-02-16 09:56:32 · answer #2 · answered by 7 · 1⤊ 1⤋
I like stmc's answer because, not only is she correct, she gives the reason behind the question not just the answers. Maybe that way the questioner will learn how the answer is arrived at and will be more likely to remember how to answer the questions on a future test.
2007-02-16 10:11:27 · answer #3 · answered by Twizard113 5 · 1⤊ 0⤋
1) b
2) d
3) a
4) d
2007-02-16 09:54:01 · answer #4 · answered by Anonymous · 0⤊ 0⤋
hey this was my science homework a few days ago! you in my class? haha
2007-02-16 09:54:09 · answer #5 · answered by basketballstar0707 2 · 0⤊ 1⤋
1. a
2. d
3. a
4. d
2007-02-16 09:54:40 · answer #6 · answered by Anonymous · 0⤊ 0⤋