Please select TWO options as your correct answers. TWO correct answers will give you correct answer. WRONG answers If you choose ONE answer only or only ONE answer is correct. 1) A 2.0 kg mass moving to the east at a speed of 4.0ms^-1 collides head-on in a perfectly inelastic collision with a stationary 2.0 kg mass. How much kinetic energy is lost during this collision (magnitude and unit)? a) 4.0 b) 8.0 c) 16.0 d) J e) N
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Please select TWO options as your correct answers. TWO correct answers will give you correct answer.
WRONG answers If you choose ONE answer only or only ONE answer is correct.
1) A 2.0 kg mass moving to the east at a speed of 4.0ms^-1 collides head-on in a perfectly inelastic collision with a stationary 2.0 kg mass. How much kinetic energy is lost during this collision (magnitude and unit)?
a) 4.0
b) 8.0
c) 16.0
d) J
e) N
2)A ping-pong ball moving east at a speed of 4.0 ms^-1 , collides with a stationary bowling ball. The Ping-Pong ball bounces back to the west, and the bowling ball moves very slowly to the east. (i) Which object experiences the greater magnitude impulse during the collision? (ii) What type of collision that they experience?
a) Elastic collision
b) The bowling ball
c) In- ellastic collision
d) The ping-pong ball
e) Neither, both experienced the same magnitude impulse
3)You slam on the brakes of your car in a panic and skid a certain distance on a straight, level road. The brakes of your car cause it to slow down by applying a retarding force of 3.0x10^3 N over a distance of 850 m. (i) What is the net work done by this force on the car? (ii) Is the work positive or negative?
a) zero
b) 2.6 10^3 N
c) 2.6x10^6 N
d) Positive work
e) Negative work
4) Water flows through a horizontal pipe of cross-sectional area 10.0 cm^2 at a pressure of 0.250 atm. The flow rate is 1.00x10^-3 m^3 s^-1. At a valve, the effective cross-sectional area of the pipe is reduced to 5.00 cm^2 What is the pressure at the valve (magnitude and unit)?
a) 0.157
b) 0.200
c) 0.235
d) atm
e) J
5) The planet Jupiter is 7.78x10^11 m from the Sun. How long does it take for Jupiter to orbit once about the Sun (magnitude and unit)?
(Given, distance from the Earth to the Sun is 1.50x10^11 m)
a) 3.0
b) 6.0
c) 12.0
d) m
e) yr
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