How things work college course/Conceptual physics wikiquizzes/Velocity and acceleration



{When a table cloth is quickly pulled out from under dishes, they hardly move. This is because} - the cloth is more slippery when it is pulled quickly + the cloth is accelerating for such a brief time that there is little motion - objects don't begin to accelerate until after the force has been applied {A car is traveling west and slowing down. The acceleration is} - zero + to the east - to the west {A car is traveling east and slowing down. The acceleration is} - zero - to the east + to the west {A car is traveling east and speeding up. The acceleration is} + to the east - to the west - zero {If you toss a coin into the air, the acceleration on the way up is} + down - zero - up {A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is} + west - zero - south - north - east {A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is} + east - south - north - zero - west {As the Moon circles Earth, the acceleration of the Moon is} - away from Earth + towards Earth - opposite the direction of the Moon's velocity - in the same direction as the Moon's velocity - zero {If you toss a coin into the air, the acceleration on the way down is} - up + down - zero {If you toss a coin into the air, the acceleration while it as its highest point is} - up + down - zero {If you toss a coin into the air, the velocity on the way up is} - zero - down + up {If you toss a coin into the air, the velocity on the way down is} + down - zero - up {If you toss a coin into the air, the velocity while it as its highest point is} - up + zero - down {A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points} + northwest - south - southwest - north - northeast {A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points} - southwest - south - northwest - north + northeast {A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points} - northeast - southeast - northeast - northwest + north {A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points} + north - northwest - south - northeast - southwest {A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points} - west - northwest + southwest - southeast - south {A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points} - northwest - north - south - northeast + southeast