A person stands 3.6m in front of a wall that is covered floor to ceiling with a plane mirror. His eyes are 1.8m above the floor. He holds a flashlight between his feet and manages to point it at the mirror. At what angel of incidence must the light strike the mirror so...
A schematic diagram incorporates a 12V battery in series with a 3.0 ohm resistor. The current then flows through 12 ohm and 4.0 ohm resistors in parallel with each other.
a) calculate the current through and voltage across each resistor. 3.0ohm 4.0 ohm 12ohm 24ohm 4.8 ohm...
I'm only looking for the force that the fulcrum exerts and I thought I had to use the torque equation in order to find it with what I am given, or am I mistaken? by 710 I meant the combined weight of the person and the board.
Im not sure if I have to add both weights and if so I dont know if I am adding them to the right spots.
Q) A 596N diver is standing at the edge of a diving board, 1.9m from the fulcrum of a 114N diving board. The fulcrum is located 2.1m from where it is bolted at the opposite end
a good bunter pulls the bat back right as contact is made with the ball. Why is this so?
1 This action decreases the impulse of the bat on the ball
2 This action increases the impulse of the bat on the ball
3 This action increases the average force of the bat on the ball
4 This action...
When I look at this problem I still see the answer being that the sand and water exert the same impulses but the sand exerts greater average force. This is because larger force but less time and therefore smaller force but more time for water. What is the error in my logic?
Jumping onto sand vs. jumping into water results in which of the following as each substance brings you to a halt?
a) The sand exerts a greater impulse than the water
b) The water exerts a greater impulse than the sand
c) The sand and water exert the same impulse, but the sand exerts a...
A hockey goalie m=85kg stands in front of the net. A player hits the 0.15kg puck towards the goalie with a velocity of +59m/s. The goalie catches the puck with his glove in a time of 0.0021seconds. (assume all collisions are linear)
A) what is the average force of the puck on the goalie?
I have no idea how to do this first one
1. Youre coasting with a friend on a sled, going a constant velocity, having a momentum of +120kg m/s when suddenly your friend bails off the sled. Assuming there are no net external forces acting on the system which of the following gives a correct...