Momentum practice problems
use your knowledge about solving equations to work out the following problems. be
sure to show all your work with units:
1. if the truck has a mass of 2,000 kilograms, what is its momentum? (v = 35 m/s)
express your answer in kg: m/sec.
2. if the car has a mass of 1,000 kilograms, what is its momentum? (v = 35 m/s)
3. an 8-kilogram bowling ball is rolling in a straight line toward you. if its momentum is 16
kg. m/sec, how fast is it traveling?
4. a beach ball is rolling in a straight line toward you at a speed of 0.5 m/sec. its
momentum is 0.25 kg. m/sec. what is the mass of the beach ball?
5. a 4.000-kilogram truck travels in a straight line at 10.0 m/sec. what is its momentum?
6. a 1,400-kilogram car is also traveling in a straight line. its momentum is equal to that
of the truck in the previous question. what is the velocity of the car?

1. 70000 kg. m/s

2. 35000 kg. m/s

3. 2 m/s

4. 0.5 kg

5. 40 kg. m/s

6. 0.03 m/s

Explanation:

1. p = mv

p =?

m = 2000kg

v = 35 m/s

p = 2000 × 35

p = 70000 kg.m/s

2. p = mv

p =?

m = 1000kg

v = 35m/s

p = 1000 × 35

p = 35000kg.m/s

3. p = mv

p = 16kg.m/s

m = 8kg

v = ?

16 = 8 × v

divide both sides by 8

16      =         8 × v

__                

8                     8

2       = v

v   = 2m/s

4.  p =mv

p = 0.25kg.m/s

m = ?

v = 0.5m/s

0.25 = m × 0.5

divide both sides by 0.5

0.25     =      m × 0.5

___              

0.5                     0.5

0.5   = m

m = 0.5kg.

5. p = mv

p = ?

m = 4kg

v = 10m/s

p = 4 × 10

p = 40kg.m/s

6. p =mv

using momentum from previous question as specified

p = 40kg.m/s

m = 1400kg

v = ?

40 = 1400 × v

divide both sides by 1400

40         =        1400 × v

1400                  1400

0.03 = v

v = 0.03m/s.

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

no sign of dia of fuel cell