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WorksheetsPhys 2420 Exam 1 Review
Total questions: 17
Worksheet time: 24mins
Fred is driving his Volkswagen Beetle at a steady 20m/s when he passes Betty sitting at rest in her Porsche. Betty instantly begins accelerating at 5.0m/s2. How far does Betty have to drive to overtake Fred?
120 m
200 m
160 m
90 m
A particle starts from x0=10m and t0=0s and moves like so: Does the particle have a turning point?
No, there is not a turning point
Yes, at t=1s
Yes, at t=2 s
Yes, at t=3s
A particles starts from x0=10m and t0=0s and moves like so: What is the object’s position at t=2s?
0 m
4 m
8 m
10 m
A sprinter can accelerate with constant acceleration for 4.0s before reaching top speed. He can run the 100-meter dash in 10.0s. What is his speed as he crosses the finish line?
12.5 m/s
14.6 m/s
16.7 m/s
20.4 m/s
Four forces are exerted on the object shown. The net force is Fnet= F1+F2+F3+F4= 4î N. What is F3?
6î+4.95j
0î+2.95j
2î-2.4j
-6.32+1.9j
Four forces are exerted on the object shown. The net force is Fnet=F1+F2+F3+F4=4î. What is F4?
2.36î-3.36j
4.42î+0j
0î-4.42j
-1.64î+0j
A stunt man drives a car off a 10m high cliff at a speed of 20.0m/s. How far does the car land from the base of the cliff?
28.6 m
32.2 m
19.5 m
52.9 m
Which figure shows 2A-B?
A
B
C
D
E
A gray kangaroo can bound across level ground with each jump carrying it 10 m from the takeoff point. Typically the kangaroo leaves the ground at a 20o. If this is so, what is its takeoff speed?
6 m/s
24 m/s
12 m/s
20 m/s
A gray kangaroo can bound across level ground with each jump carrying it 10 m from the takeoff point. Typically the kangaroo leaves the ground at a 20o angle. If this is so, what is its maximum height above ground?
2.0 m
1.5 m
0.9 m
0.6 m
A physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory shown. The ball's position is shown at 1s intervals until t=3s. At t=1s, the ball's velocity is v=(2î+2j)m/s. Determine the ball's velocity at t=0s.
(2î+2j)m/s
(2î+4j)m/s
(2î+0j)m/s
(2î-2j)m/s
A physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory shown. The ball's position is shown at 1s intervals until t=3s. At t=1s, the ball's velocity is v=(2î+2j)m/s. What was the ball's launch angle?
26o
45o
54o
63o
A rifle is aimed horizontally at a target 50 m away. the bullet hits the target 2.0 cm below the aim point. What was the bullet's flight time?
0.021 s
0.035 s
0.064 s
0.072 s
A rifle is aimed horizontally at a target 50 m away. the bullet hits the target 2.0 cm below the aim point. What was the bullet's speed as it left the barrel?
550 m/s
620 m/s
720 m/s
780 m/s
A ceiling fan spinning at 60 rpm coasts to a stop 25s after being turned off. How many revolutions does it make while stopping?
8 rev
13 rev
16 rev
23 rev
A projectile is launched with speed v0 and angle θ. Derive an expression for the projectile's maximum height h.
h= -(v02cos2θ)/2g
h= (v02cos2θ)/2g
h= (v02sin2θ )/2g
h= -(vo2sin2θ )/2g
A projectile is launched with speed v0 and angle θ. Using the equation derived for height h, a baseball is hit with a speed of 33.6m/s. Calculate its height if the baseball is hit at an angle of 30o.
23.2 m
45.6 m
14.4 m
19.5 m
