An 8.0 m 100 n uniform ladder rests against a smooth wall., Ask an Expert

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Q. An 8.0 m, 100 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.40, what is the minimum angle that ladder can make with the floor before it slips?

Q. A 68.5- kg ice skater moving to the right with a velocity of 2.89- m/s throws a 0.18 kg snowball to the right with a velocity of 20.6 m/s relative to the ground.

(1) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between skates and ice.

(2) A second skater initially at rest with a mass of 60-kg catches the snowball. What is the velocity of the second skater after catching the snowball in a perfectly inelastic collision?

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