Questions
1. A particle travels 20 m in 4 s. Find its speed.
2. A car accelerates from rest at
3
m s
โ2
for 5 s. Find its final velocity.
3. State Newton's First Law.
4. Find the force needed to accelerate a 12 kg mass at
4
m s
โ2
.
5. A particle has velocity:
v
=5
t
+2
Find
v
when
t
=6
.
6. A 2 kg object moves at
8
m s
โ1
. Find its momentum.
7. A particle moves with acceleration:
a
=4
m s
โ2
for 7 s from rest. Find the distance travelled.
8. A force of 30 N acts on a mass of 10 kg. Find the acceleration.
9. A particle moves with velocity:
v
=
t
2+4
Find the acceleration when
t
=3
.
10. A 1500 kg car travelling at
20
m s
โ1
brakes uniformly to rest
in 5 s. Find its acceleration.
Answers
1.
5
m s
โ1
2.
15
m s
โ1
3. An object remains at rest or moves at constant velocity unless
acted on by a resultant force.
4. 48 N
5.
32
m s
โ1
6.
16
kg m s
โ1
7. 98 m
8.
3
m s
โ2
9.
6
m s
โ2
