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☆☆☆☆☆Cards in this guide (15)
A rock is dropped from a cliff and hits the ground 6.0 seconds later How high is the cliff
176.4 meters
A hammer is dropped off a roof of an apartment building that is 80 meters high How long will it take to hit the ground
The hammer will take square-root(2x80/9.8)= 4.04 seconds to hit the ground.
The distance is related to the time by s=v0t + 1/2 gt^2 where vo, the initial velocity is=0.
The answer is 4.04 or rounded is 4 seconds.
A baseball is hit straight up at an initial velocity of 150MS. what will be the baseballs speed when it hits the ground
20.40
A man and a woman exert a total of 900 N by pushing a car 20 meters across the street The man exerts twice as much force as the woman How much work does the man do
The man exerts a force of 600 N and the woman exerts a force of 300 N. Work done by the man = Force x displacement = 600 x 20 = 12,000 J Hence, the man performs 12,000 joules of work.
How much work is done when a 6.0 n weight is raised 2.0 meters off the ground
12j
A force of 20 N gives a ball an acceleration of 4.0 ms on a level frictionless surface what is the mass of the ball
F=ma
m=F/a
m=20/4.0
m=5Kg
What type of measurement A northwesterly wind of 5 miles per hour
vector
It is a meteorological measurement.
Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force
10 newtons NE. a little more north than east
A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How high was the cliff rounded to the nearest meter
Answer: 44 meters
What does a force cause a mass to do
accelerate
During a baseball game the batter hits a high pop up directly over home plate If the ball stays in the air six seconds how high did the ball go
176.4 meters
What does a force applied to a stationary object give the object
"Motion" or "Momentum"
A plane is flying north at a speed of 200 miles per hour The wind is blowing at a constant speed of 40 miles per hour from the east What is the resulting speed of the plane calculated to the nearest
204 mph
A pulley system is used to lift a 2000 newton engine up a distance of 3 meters The operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor To lift the engine fi
250 newtons
A+ Answers
A rifle is shot straight up and the bullet leaves the barrel at a speed of 245 m s How long will it take the bullet to hit the ground
50 sec.
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