LET'S CHECK!
A. Choose the letter of the correct answer.
1. Where is the gravitational force directed as you stand on the floor?
a. upward
C. backward
b. forward
d. downward
2. Which of the following equals the force exerted by the earth on you?
a. your mass
c. half your mass
b. your weight
d. half your weight
3. Which of the following shows the presence of friction?
cars continuously roll down hills
b. things fall off on smooth surfaces
C. people stay in place as they move
d. cars stop when the driver steps on the brakes
4. How distance between two objects affects the pull of gravity?
the lesser the distance, the lesser the gravitational pull between them
b. the greater the distance, the lesser the gravitational pull between them
c. the greater the distance, the greater the gravitational pull between them
d. none of these, gravitational pull between them depends on their weights
a.
a.​