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A boy jumps with a velocity of magnitude 20.0 m/s at an angle of 25.0° above the horizontal. What is the horizontal component of the boy's velocity?
18.1 m/s
Only Electrons
False
The net force on the object is zero.
inward toward the earth
is half as much as before.
69.9 kg
the radius of the sphere.
A railroad car collides with and sticks to an identical railroad car that is initially at rest. After the collision, the kinetic energy of the system
18.1 m/s
Only Electrons
False
The net force on the object is zero.
inward toward the earth
is half as much as before.
69.9 kg
the radius of the sphere.
If a satellite moves with constant speed in a perfectly circular orbit around the earth, what is the direction of the acceleration of the satellite?
18.1 m/s
Only Electrons
False
The net force on the object is zero.
inward toward the earth
is half as much as before.
69.9 kg
the radius of the sphere.
An object is moving with constant non-zero velocity. Which of the following statements about it must be true?
18.1 m/s
Only Electrons
False
The net force on the object is zero.
inward toward the earth
is half as much as before.
69.9 kg
the radius of the sphere.
When a current flows through a metal wire, the moving charges are
18.1 m/s
Only Electrons
False
The net force on the object is zero.
inward toward the earth
is half as much as before.
69.9 kg
the radius of the sphere.
Suppose a solid uniform sphere of mass M and radius R rolls without slipping down an inclined plane starting from rest. The angular velocity of the sphere at the bottom of the incline depends on
18.1 m/s
Only Electrons
False
The net force on the object is zero.
inward toward the earth
is half as much as before.
69.9 kg
the radius of the sphere.
What is the mass of an object that experiences a gravitational force of 685 N near Earth's surface where g = 9.80 m/s2?
18.1 m/s
Only Electrons
False
The net force on the object is zero.
inward toward the earth
is half as much as before.
69.9 kg
the radius of the sphere.
If the velocity of an object is zero at some point, then its acceleration must also be zero at that point
18.1 m/s
Only Electrons
False
The net force on the object is zero.
inward toward the earth
is half as much as before.
69.9 kg
the radius of the sphere.
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