Physics Midterm Questions & Answers

Physics Midterm Questions & Answers A 20-N weight and a 5.0-N weight are dropped simultaneously from the same height. Ignore air resistance. Compare their accelerations. - CORRECT ANSWER- equal A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall of the two bullets. - CORRECT ANSWER- equal A constant net force acts on an object. Describe the motion of the object. - CORRECT ANSWER- constant accleration A golf club hits a golf ball with a force of 2400 N. The golf ball hits the club with a force - CORRECT ANSWER- 2400 N A net force F accelerates a mass m with an acceleration a. If the same net force is applied to mass 2m, then the acceleration will be - CORRECT ANSWER- a/2 A rocket moves through empty space in a straight line with constant speed. It is far from the gravitational effect of any star or planet. Under these conditions, the force that must be applied to the rocket in order to sustain its motion is - CORRECT ANSWER- zero A soccer ball is kicked with a velocity of 35 m/s at an angle of 45° above the horizontal. What is the vertical component of its acceleration as it travels along its trajectory? - CORRECT ANSWER- -g = -9.8 m/s^2 Can an object have increasing speed while its acceleration is decreasing? - CORRECT ANSWER- yes Can an object's velocity change direction when its acceleration is constant? - CORRECT ANSWER- yes (object thrown up