Torque
1DK
Freefall
2DK
Assorted Flagellates and Calculations
100
What is torque
A force that causes rotation
100
When you look at the speedometer while driving, what are you seeing?
Instantaneous velocity
100
A ball is thrown straight up. At its peak, the velocity is
0 m/s
100
At the instant a ball is thrown at a high speed an identical ball is dropped from the same height. Which will hit the ground first?
They will land at the same time
100
Will tying a rope as show increase torque on the bolt? Explain.
No. As the rope is at a right angle to the wrench, the lever arm is the same length.
200
The equation for torque
T = L x F
200
A bike goes 5 m in 1 s, 5 m again in the second second, and 5 m again in the third second. What is the acceleration?
0 m/s2
200
A ball is thrown straight up, on the way up, its acceleration is
-10 m/s2
200
At what part of a path does a projectile launched at a 40 degree angle have minimum speed?
Top of its path
200
You find yourself on a distant planet with different gravity than Earth's. You drop a rock from 55 m and the rock strikes the ground 1.9 s later. How many times greater is the acceleration due to gravity than Earth's own?
g = 30.5 m/s2
About 3x the gravity
About 3x the gravity
300
At what angle is torque most efficiently applied
90 degrees to the lever arm
300
A bike goes 5 m in 1 s, 5 m again in the second second, and 5 m again in the third second. What is the velocity?
5 m/s
300
If a projectile is launched straight up at 40 m/s, what is the total time needed to return to its starting point?
8 seconds
300
A baseball is thrown upward at a 30 degree angle and lands on a target at the same level from which it was thrown. At what other angle could a baseball be thrown with the same velocity to land at the same target?
60 degrees
300
maritrema subdolum
400
Calculate the torque produced by at 35 N force appleid perpendicular to a 0.2 m lever arm.
7 Nm
400
How much time does it take for a car with an acceleration of 7 m/s2 to go from 14 to 35 m/s?
3 s
400
A stone is dropped from a bridge. It falls for 16 seconds. How fast is it traveling at impact?
160 m/s
400
A boat is crossing a river to the north at 3 km/hr with a eastern cross current at 10 km/hr. What is the resulting velocity of the boat?
10.4km/hr at 16.7o N of E
400
Kyle throws a ball from ground level with a speed of 30 m/s at an angle of 30o. It lands at the same level at which it is thrown. What is the maximum height and range?
DY = 11.25m
DX = 38.97m
500
Two children sit on a see-saw. A 200 N kid sits 5 m from the fulcrum. If the other kid is 300 N, how far should they sit to balance the see-saw?
L = 3.3m
500
During a speed test, a car accelerates from rest at 0.002 mi/s. How far does it go if the car travels for 7 seconds.
0.049 mi
500
Your egg drop fell 7 m, for how long was it in the air?
1.18 seconds
500
A steel ball is shot by a cannon horizontally from a 180 m cliff. If the initial speed is 90 m/s what is the horizontal range?
Time = 6s
Range = 540 m
500
Chlamydomonas