1. Force and Motion Review Week Mrs. V. Science 2014

2. Monday:  1. In which of the following activities is friction helpful? a. car tires moving a car forward b. soil erosion c. engine parts wearing out d. holes developing in your socks  2. In which of the following activities is friction harmful? a. brakes stopping a car b. an eraser erasing c. a person walking d. car engine parts wearing out  3. When the net forces equal 0 N, they are which of the following? a. balanced b. a push c. unbalanced d. a pull

3. Monday:  1. In which of the following activities is friction helpful? a. car tires moving a car forward b. soil erosion c. engine parts wearing out d. holes developing in your socks  2. In which of the following activities is friction harmful? a. brakes stopping a car b. an eraser erasing c. a person walking d. car engine parts wearing out  3. When the net forces equal 0 N, they are which of the following? a. balanced b. a push c. unbalanced d. a pull A. D. A.

4. Tuesday:  1. The distance from the plate to the pitcher’s mound to home plate is 18 meters. If it takes 0.5 seconds for the pitch to reach home plate, how fast is the ball traveling? a. 9 m/s b. 36 mi/h c. 36 m/s d. 3.6 m/s 2. Choose the answer choice that represents a velocity. a. 20 mi/h west b. 14 mi/h c. 30 km/h west d. both 20 mi/h west and 30 km/h west 3. Which of the following causes an object to start moving? a. balanced b. either balanced or unbalanced c. unbalanced d. Any combination of forces

5. Tuesday:  1. The distance from the plate to the pitcher’s mound to home plate is 18 meters. If it takes 0.5 seconds for the pitch to reach home plate, how fast is the ball traveling? a. 9 m/s b. 36 mi/h c. 36 m/s d. 3.6 m/s 2. Choose the answer choice that represents a velocity. a. 20 mi/h west b. 14 mi/h c. 30 km/h west d. both 20 mi/h west and 30 km/h west 3. Which of the following causes an object to start moving? a. balanced b. either balanced or unbalanced c. unbalanced d. Any combination of forces C. D. C.