||An object is launched over level ground at 35° above the horizontal
with an initial speed of 52 m/s. What is the time of flight?
|A. 5.3 s
||B. 6.1 s
||C. 8.7 s
||D. 11 s
||A ball is kicked into the air from the surface of a playing field.
If friction is negligible, the ball will follow a path that is
||A rock is thrown from ground level at 18 m/s, 25° above horizontal.
What are the vertical and horizontal components of its launch velocity?
7.6 m s
||A motorcycle accelerates uniformly from 12 m/s to 30 m/s while travelling
420 m. Its acceleration is
|A. 0.043 m/s2
||B. 0.050 m/s2
||C. 0.10 m/s2
||D. 0.90 m/s2
||A ball is thrown from level ground at 24 m/s, 30° above horizontal.
How much time will it take to reach its maximum height?
|A. 1.2 s
||B. 2.1 s
||C. 2.4 s
||D. 7.3 s
||The graph shown below displays velocity v versus time t for a moving
The slope of this graph represents the object's
||The projectile shown below has an acceleration which is
||B. in the direction of P.
||C. in the direction of Q.
||D. in the direction of R.
||When a 2.0 kg rock is dropped from a cliff it hits the beach at 24
m/s. At what speed would a 4.0 kg rock, dropped from the same cliff, hit
the beach? Ignore friction.
|A. 12 m/s
||B. 24 m/s
||C. 34 m/s
||D. 48 m/s
||Which of the following statements concerning
vector and scalar quantities is incorrect?
|A. All scalar quantities have direction.
||B. All vector quantities have direction.
|C. All scalar quantities have magnitude
||D. All vector quantities have magnitude.
||Starting from rest, a jet takes 25 s and needs 1500 m of runway to
become airborne. What is its speed when it leaves the ground?
|A. 60 m/s
||B. 120 m/s
||C. 250 m/s
||D. 1500 m/s
||At t = 0 s a ball rolls off the edge of a
vertical cliff. At t = 2.0 s the ball is 6.0 m from the cliffshown. How
far is the ball from the cliff at t = 4.0 s?
|A. 6.0 m
||B. 9.0 m
||C. 12 m
||D. 24 m
||A rock is released from the top of a 30 m-high cliff at the same time
as a ball is thrown upwards from the base of the cliff at 20 m/s. How much
time elapses before they collide?
|A. 1.0 s
||B. 1.2 s
||C. 1.5 s
||D. 2.5 s
||Which of the following remain(s) constant for a projectile: its horizontal
velocity component, vH , its vertical velocity
component, vV , its vertical acceleration,
||B. g and vV
||C. g and vH
||D. g, vH and vV
||Which of the following graphs represents the horizontal velocity component
(Vx) versus time for a projectile thrown horizontally
off a cliff? (Ignore air resistance.)
||A skier accelerates uniformly from 5.2 m/s to 12.8 m/s at 0.85 m/s2
. Find the distance she travels.
|A. 7.7 m
||B. 8.9 m
||C. 11 m
||D. 80 m
||At what speed must a ball be thrown upwards to reach a maximum height
of 25 m?
|A. 2.6 m/s
||B. 22 m/s
||C. 2.5 x 102 m/s
||D. 3.1x 103 m/s
||A projectile is launched over level ground with a speed of 240 m/s
at 35° to the horizontal. If friction is negligible, what is the height
of the projectile 17 s after launch?
|A. 9.2 x 102 m
||B. 1.9 x 103 m
||C. 2.7 x 103 m
||D. 5.5 x 103 m
||A ball is rolled off a horizontal roof at 16 m/s. After leaving the
roof, how long will the ball take to reach a speed of 18 m/s?
|A. 0.20 s
||B. 0.84 s
||C. 1.8 s
||D. 2.5 s
||A car is travelling at a constant speed of 26.0 m/s down a slope which
is 12.0° to the horizontal. What is the vertical component of the car's
|A. 5.41 m/s
||B. 9.80 m/s
||C. 25.4 m/s
||D. 26.0 m/s
||A rock is thrown from a clifftop at 18 m/s, 25° above the horizontal.
It lands on the beach 4.2 s later.
a) What is the height h of the cliff? (4 marks)
b) How far from the base of the cliff d did the rock land? (3 marks)