- A vector is a quantity that has
Your answer:
no answer
no answer
magnitude and time
time and direction
magnitude and direction
- When representing velocity as a vector
Your answer:
none of the anwsers
the length of the arrow is drawn to a suitable scale
the direction of the arrow shows the direction of motion
the length of the arrow represents the speed
all the answers
- In order to find the components of a vector in the horizontal and vertical directions, you should
Your answer:
draw a rectangle so that the vector is the diagonal
measure the sides of the rectangle
none of the ansers
draw the vector with correct magnitude and direction
all of the answers
- Which of the following would not be considered a projectile?
Your answer:
A cannonball rolling down a slope
A cannonball rolling off the edge of a table
All of them are projectiles
A cannonball thrown through the air
A cannonball thrown straight up
- In the absence of air friction, the vertical component of a projectile’s velocity doesn’t change as the projectile moves.
Your answer:
Always false
Sometimes true
Always true
No answer
No answer
- In the absence of air friction, the horizontal component of a projectile’s velocity doesn’t change as the projectile moves
Your answer:
No answer
No answer
Sometimes true
Always true
Always false
- A ball is thrown into the air at some angle. At the very top of the ball’s path, its velocity is
Your answer:
entirely horizontal
both vertical and horizontal
there’s not enough information given to determine
no answer
entirely vertical
- In the previous question the acceleration of the ball at the top of the ball’s path is
Your answer:
no answer
0 m/s/s
no answer
10 m/s/s upwards
10 m/s/s downwards
- A zoo keeper fires a banana at a monkey hanging in a tree. If the monkey lets go at the moment the banana is launched where must the keeper aim the banana?
Your answer:
no answer
below the monkey
no answer
right at the monkey
above the monkey
- In the absence of air resistance, the angle at which a thrown ball will go the farthest is
Your answer:
45 degrees
60 degrees
30 degrees
75 degrees
15 degrees
- A projectile launched horizontally hits the ground in 0.5 seconds. If it had been launched with a higher speed in the same direction, it would have hit the ground (neglecting the curvature of the Earth and air resistance) in
Your answer:
less than 0.5 seconds
no answer
0.5 seconds
not enough information to say
more than 0.5 seconds
- A ball thrown horizontally from the top of a tall cliff. Neglecting air drag, what vertical distance has the ball fallen three seconds later?
Your answer:
not enough information to say
15m
45m
80m
30m
- A projectile is fired at an initial speed at an angle of 25 degrees. If it is then fired at an angle of 65 degrees, neglecting air resistance,
Your answer:
at the higher angle it will be in the air for less time and will have a shorter range
none of these are true
at the higher angle it will be in the air for less time and will have a longer range
at the higher angle it will be in the air for longer and will have a shorter range
at the higher angle it will be in the air longer and will have a longer range
- A football player kicks a ball at a speed of 26 m/s at an angle of 67 degrees. How long is it in the air (hang time)? (Hint: special triangle)
Your answer:
4.8s
2s
2.4s
not enough information to say
1s
- For the previous question, what is the range of the football?
Your answer:
not enough information to say
48m
6m
12m
24m
- A projectile shot with an initial velocity of 101 m/s at an angle of 45 degrees, follows a parabolic path and hits a stationary balloon at the top of its trajectory. With what speed does the projectile hit the balloon?
Your answer:
none of these answers
0 m/s
50.5 m/s
71.4 m/s
101 m/s
- A airplane is flying north but the wind is blowing east. The plane’s groundspeed is
Your answer:
equal to the airspeed minus the wind speed
less than the wind speed
more than the airspeed
the same as the airspeed
less than the airspeed
- Rain falling vertically makes streaks on a side door car window at 30 degrees to the vertical. What does this tell you about the speed of the falling rain?
Your answer:
the rain is traveling faster than the car
no answer
the rain is traveling at the same speed as the car
the rain is traveling slower than the car
no answer
- A boat is rowed at 4.0 km/h directly across a river in water that is flowing at right angles at 8.0 km/h. The resulting speed of the boat is about?
Your answer:
12 km/h
6 km/h
4 km/h
more than 12 km/h
9 km/h
- If the river is 0.5 km wide, how long does it take the boat to cross if it can maintain a constant speed?
Your answer:
2.5 mins
7.5 mins
none of these answers
3.33 mins
3.75 mins