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The force is at its minimum when the angle is 90°c and the particle moves in a circle.
A. True
B. False
Magnetic field exists in a region of space if a moving charge there experiences a force due to its motion.
A. True
B. False
what happens when a temporary magnet keeps its magnetism for a long time?
A. easily loses its magnetism
B. realigned domain
C. has two north poles
D. cannot be destroyed
Explain why the skater spins faster when she
closes her arms but she opens her arms to
stop spinning in figure skating.
In a large hollow cylinder, roller-coaster rider
can drive the car along the wall of the cylinder.
What minimum speed must be the car
without sliding downward?
For a given body, the moment of inertia is [
Best answer
(A) constant.
(B) independent on the mass.
(C) dependent on the location of the center of
rotation.
(D) dependent on the angular velocity.
The young modulus of elasticity is defined as
E=f/a÷e/l
obtain the dimension of E where f=force
A=area
e and l =length
Emmanuel Zacchini launched as a human cannonball in 1940 soared over three Ferris wheels each 18.0 m high covering a horizontal distance of 10.63m. a.) Assuming that the point of projection is 2.50 m above the ground and that he landed safely on a net placed at the same level, find his initial velocity. b.) Assuming that he missed the net and landed on the ground, with what velocity will he strike the ground?
Emmanuel Zacchini launched as a human cannonball in 1940 soared over three Ferris wheels each 18.0 m high covering a horizontal distance of 10.63m. a.) Assuming that the point of projection is 2.50 m above the ground and that he landed safely on a net placed at the same level, find his initial velocity. b.) Assuming that he missed the net and landed on the ground, with what velocity will he strike the ground?
Find the force necessary to keep the toy car in equilibrium. The mass of the toy is 5kg and the inclination of the plane is 30°. Friction is neglected.
Please show the complete solution.
#340153 on Dec 2023