PA SAGOT PO NG TAMA. TY
• What is the velocity of a truck that moved 480 m East in 60 minutes?
1. What is the displacement of the truck?
2. What is the time traveled by the car?
3. What is the formula of velocity given the displacement and the time?
4. What is the velocity of the truck? (Show your solution.)
Share
Answer:
• A truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of 400m in 20s. Find the acceleration. Find the force acting on it if its mass is 7 tonnes. (Hint: 1 tonne = 1000 kg.)
Explanation:
Initial velocity of the truck, u=0
Distance covered by the truck, s=400 m
Time taken to cover that distance, t=20 s
Let the acceleration of the truck be a
s=ut+
2
1
at
2
400=(0)20+
2
1
a(20)
2
a=2 m/s
2
Mass of the truck M=7 tonnes=7000 kg (∵1 tonne=1000 kg)
F=Ma=7000×2 =14000 N