A man standing on frictionless ice throws a 1.00-kg mass at 29.0 m/s at an angle of elevation of 50.0°. What was the magnitude of the man's momentum immediately after throwing the mass?
a. 45.1 kg·m/s
b. 18.6 kg·m/s
c. 22.2 kg·m/s
d. 37.9 kg·m/s
e. This cannot be answered because the mass of the man needs to be known.
b
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If a car increases its velocity from zero to 60 m/s in 10 seconds, its acceleration is
A) 3 m/s2. B) 6 m/s2. C) 60 m/s2. D) 600 m/s2.
A 10.0-kg shell is traveling horizontally to the right at 25.0 m/s relative to the ground when it explodes into two fragments, one of mass 3.00 kg and the other of mass 7.00 kg
The lighter fragment goes directly forward, and the explosion releases 1.50 × 103 J of mechanical energy to the fragments. Find the magnitude and direction of the velocity of the heavier fragment relative to the ground just after the explosion. Ignore the effect of any ejected gases.
A wire is lying horizontally in the north-south direction and the horizontal magnetic field is toward the east. Some positive charges in the wire move north and an equal number of negative charges move south. The direction of the force on the wire will be:
a.
east.
b.
down, into the page.
c.
up, out of the page.
d.
There is no magnetic force.
The frequency of visible light determines its color
Indicate whether the statement is true or false