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100
Which is a vector? A) Distance B) Speed C) Force
What is Force
100
Shaniqua lifts a box that weighs 180N. The box is lifted 1m. How much work does the student do?
What is 180J W=Fd W=(180N)(1m)
100
What is a fundamental unit? A) s B) km C) Celcius
What is A) seconds
100
Using dimensional analysis found out how many seconds are in a day.
What is 86400 seconds 1day x 24 hours x 60 minutes x 60 seconds= 86400 1day 1 hour 1 minute
100
A weightlifter is bench pressing 130kg. He pushes the weight bar .5m up and down 7 times. What is the total work done?
What is 0J The displacement is 0 W=Fd
200
Using Dimensional analysis convert 100 pounds to Kilograms. 1pound= .454 kg
What is 45.4 kg 100pounds x .454= 45.4 kg
200
Solve: Boomtifa travels 30m, it takes her 10 seconds to get to her destination from rest. What was her acceleration?
What is 5.4 m/s^2 Using d=(v-initial)(t)+1/2(a)(t)^2 30m=(0m/s)(10) + 1/2(a)(10)^2 a= 5.4m/s^2
200
Tommy Chong throws a water balloon down at 5m/s from 10m high. What is the final velocity?
What is 13.08 m/s Vf^2=Vi^2+2ad Vf^2=(5m/s)^2+2(-9.81m/s^2)(10m)
200
A man pushes a lawn mower with 25N of force at an angle of 35 degrees across a 30m yard. How much work does he do?
What is 614.36J W=Fd W=614.36J F=Fcostheta F=25Ncos35degrees F=20.48N W=(20.48N)(30m)
200
What is the order of magnitude of a football field in meters?
What is 10^2 100m
300
An airplane flying with a constant velocity at a constant altitude drops a crate. Where will the plane be relative to the crate when the crate hits the ground. Explain.
What is above it. The plane is traveling at the same horizontal velocity as the crate.
300
Which is not a fundamental unit? A) ms B) m C) K
What is A) ms
300
A hammer thrower whirls a 8kg hammer. The distance from the weight to the thrower is 3.0m. If the hammer thrower can pull in with a force of 1605N, at what speed can he whirl the hammer?
What is 24.53 m/s Fc=mv^2/r 1605N=(8kg)(v)^2/3m
300
A .03 kg bullet is fired at 350 m/s. At what speed would a 70kg man have to run to attain the same momentum?
What is P=mv P=mv P=(.03kg)(350m/s) 10.5kg m/s=(70kg)(v) P=10.5 kg m/s v=.15m/s
300
What do you use to solve a vector algebraically?
What is SOHCAHTOA or Trig
400
What is the order of magnitude of an MnM in meters?
What is 10^-3 .01m
400
Fernando drops an 1kg artichoke from a 100m cliff. Determine the final velocity.
What is 44.29 m/s Using (final velocity)^2 = (initial velocity)^2 + 2(a)(d)
400
An object traveling at 9.0 m/s has a momentum of 15 kg m/s. What is the mass of the object?
What is 1.7 kg P=mv 15kg m/s= m (9m/s) m= 1.7kg
400
A force of 830N is needed to push a car across a dirt lot. Two students push the car 30m. How much work is done?
What is 24900J W=Fd W=(830N)(30m) W=24900J
400
If the force on a spring is 300N and the elongation 25m what is the spring constant?
What is 12N/m Fs=kx 300N=k(25m) k=12N/m
500
Two balls of mass .014kg are rolling toward each other. Ball 1 is rolling to the right at 8 m/s, ball 2 is rolling to the left at 4 m/s. After they collide, ball 1 rolls to the left at 6m/s. What is the speed and direction of ball 2?
What is -1 m/s m1vi+m2vi=m1vf+m2vf (.014kg)(8m/s)+(.014kg)(-4m/s)=(.014kg)(5m/s)+(.014kg)(vf)
500
Determine the impulse if the net force is 15N and the time is 7 seconds.
What is 105Ns J=Fnet x t J= 15N x 7s
500
Find the force of friction of a wooden block being dragged across a wooden surface with a normal force of 23.77N.
What is Force of friction = 7.131N Force of friction = (mu)(Fn) Force of friction = (.30)(23.77N) Force of friction = 7.131N
500
A 1500kg car going 10 m/s hits a stationary 1300kg car. At what speed do they move off together?
What is 5.36 m/s m1vi+m2vi=(m1+m2)vf (1500kg)(10m/s)+0=(1500+1300)vf vf=5.36 m/s
500
Find the Fg between the moon and earth using the Universal Law of Gravitation.
What is 1.99 x 10^19 m/s^2 Fg= (Gm1m2)/r^2 Fg= ( 6.67x10^-11N x m^2/kg^2 x 5.98x10^24kg x 7.35x10^22kg)/ (3.84x10^8m) Fg= 1.99x10^19 m/s^2