Download newton`s first and second law worksheet combined

Newton’s First Law of Motion
A> Supply the correct term:
1. The amount of matter present in a sample is called its ____________________.
2. The force of gravity on an object is called its ____________________.
3. The tendency of an object to resist a change in its motion is called ___________________.
4. The amount of inertia depends on an object’s ____________________.
5. The unit for force is called the ____________________, which is represented by _____.
B> Supply the correct value:
6. The force exerted by gravity on 5 kg ball is __________.
7. The mass of a 150. N box is __________.
8. The weight of a 75 kg person is __________.
9. The weight of a 250 N wagon is __________.
C> Circle the object in each pair with the most inertia.
10.
11.
v = 8 m/s
2 kg
OR
4 kg
v=2
6 kg
m/s
v = 100 m/s
50 kg
OR
at rest
D> Which objects can be moving with uniform motion (constant speed) in a straight line if
the only forces acting are shown?
12.
13.
2N
14.
3N
15.
6N
2N
4N
4N
4N
6N
5N
4N
3N
8N
10 N
10 N
3N
E> Find the x and y components of the forces shown.
125 N
16.
622 N
17.
25°
40°
F> Find the missing force in each situation.
18.
19.
200 N
?
50 N
10 kg
at rest
240 N
250 N
20.
21.
?
50 N
40 N
v = 20 m/s
right
?
?
250 N
?
10 kg
v = 10 m/s
left
240 N
40 N
v = 0 m/s
100 N
60°
G> Find the net force (magnitude & direction) for each situation.
22.
23.
5N
20 N
7N
20 N
8N
24.
25.
10 N
10 N
20 N
60 N
80 N
26.
20 N
20 N
40 N
30 °
Newton’s Second Law
1)
Two people with the same mass of 50 kg are riding in a pickup truck at 20.0 m/s. They are brought to an
abrupt halt in a head-on collision. Poindexter was wearing his seat belt and was brought to a stop in
0.10 s. Billy Bob was not wearing his seat belt and was brought to a stop by the dashboard in 0.01s.
a) What was the acceleration of seat-belt-wearing Poindexter?
b) What net force was exerted by the seat belt to stop Poindexter?
c) What was the acceleration of non-seat-belt-wearing Billy Bob?
d) What net force was exerted by the dashboard to stop Billy Bob?
2)
A skater propels himself by rocket power. The total mass of Harry and the booster rocket is 25 kg.
Complete the tables below for no resistance and with some resistance.
Resistance Effect Negligible
Force Applied
Acceleration
(N)
(m/s2)
100
200
10
Constant Resistance of 50N
Force Applied
Acceleration
(N)
(m/s2)
50
100
200
3)
a)
Find the acceleration (magnitude and direction) in each case.
b)
20 N
250 N
50 N
30 N
10 kg
40 N
20 N
1.5 kg
30 °
Fnet =
a=
Fnet =
a=
Assume all forces are shown in the following diagrams and that the ball is moving
horizontally.
c)
d)
e)
f)
490 N
50 kg
700 N
50 kg
50 kg
50 kg
100 N
Fnet =
a=
4)
a)
Fnet =
a=
Fnet =
a=
Fnet =
a=
Find the missing force in each situation below.
b)
200 N
4 kg
260 N
?
?
?
78 N
100 N
60°°
a = 10 m/s2 right
a = 2.0 m/s2 right
5)
Determine the applied force, Fa, for each condition. Add the gravity (weight) force to your
diagrams.
(a)
(b)
(c)
ball moving up
ball moving with
ball at rest
at
a = 2.0 m/s2 up
20 m/s
Fa =
Fa =
Fa =
30 kg
30 kg
(d)
30 kg
(e)
ball moving with
a = 2.0 m/s2 down
Fa =
30 kg
ball moving
down at 20 m/s
Fa =
30 kg