SL Physics Midterm Questions With Complete Solutions

A projectile is launched at 20m/s at 60 degree angle from the horizontal. How much time does it take for the projectile to land, assuming it lands on ground that is level with the launch site? correct answer: 3.6s Which of the following is not a unit of the metric ststem or Systeme International? correct answer: Yard A snow skier is at the top of a mountain trying to decide which ski run to take since they all have different slopes. He wants to slide down with a constant speed. If the coefficient of kinetic friction between his skis and the snow is .05, find the angle of the path he should choose. correct answer: 2.8 degrees Which is not true? correct answer: Vector products and scalar products both change sign for angles greater than 90 degrees. Consider a mass of 85 kg lying on the ground. The coefficient of static friction between them is us=.65. What is the minimum force you need to apply in order to slide the mass? correct answer: 541N Which is correct magnitude of the position vector for the following description of the motion of an object? A car moves 3 blocks west, then 2 blocks north, then 3 blocks south before stopping briefly. It then moves 1 block east and finally 2 blocks south. correct answer: 3.6 blocks A rock is thrown vertically up into the air. It reaches a maximum height 15m above the point where it was released. What is its initial velocity? correct answer: 17m/s In an inertial reference frame, _________. correct answer: Newtons three laws are apparent and valid. Two small cards with masses m1=17kg and m2=23kg, are attatched by two ideal ropes to a steel ball of mass mb=1