Physics I: Forces

Question 1

Two people push a box in the same direction with 5 N of force each. What is the net force?

Accepted Answer

10 N

Question 2

Two people push a box in opposite directions with 5 N of force each. What is the net force?

Accepted Answer

0 N

Question 3

A bicyclist, traveling at 22 mph, rides a total of 44 mi. How many hours did it take?

Accepted Answer

2 hours

Question 4

What would happen to the force of gravity between earth & moon if the mass of the moon doubled?

Accepted Answer

Increase

Question 5

Aya's mass is 45 kg. What is her weight in newtons on the moon? (g=1.6 m/s2)

Accepted Answer

72 N

Question 6

What would happen to the force of gravity between earth & moon if their distance increased?

Accepted Answer

Decrease

Question 7

A wolf travels 250 meters in 100 seconds. What is the wolf's average speed?

Accepted Answer

2.5 m/s

Question 8

How many newtons does a 5 kg backpack weigh on the moon? (gravity on the moon = 1.6 m/s2)

Accepted Answer

8 N

Question 9

During a race, you speed up from 3 m/s to 5 m/s in 4 seconds. What is your acceleration?

Accepted Answer

0.5 m/s2

Question 10

How many Newtons does a 5 kg backpack weigh on Earth? (gravity on Earth =9.8 m/s2)

Accepted Answer

49 N

Question 11

A car accelerates from 0 to 20 m/s in 10 seconds. What is the car's acceleration?

Accepted Answer

2 m/s2

Question 12

A mouse travels at 2 m/s for 10 seconds. How many meters did the mouse travel?

Accepted Answer

20 meters

Question 13

Aya's mass is 45 kg. What is her weight in newtons on Earth? (g=9.8)

Accepted Answer

441 N

Questions 13