Get premium membership and access questions with answers, video lessons as well as revision papers.
The mattress increases the stopping time which reduces the rate of change of momentum. (Impulse)
joseph rimiru answered the question on October 6, 2017 at 20:24
- Water has a refractive index of 1.35. Determine the speed of light in water given that the speed light in air is 3.0 x 10^8...(Solved)
Water has a refractive index of 1.35. Determine the speed of light in water given that the speed light in air is 3.0 x 10^8 m/s
Date posted: October 6, 2017. Answers (1)
- A glass of refractive index 1.44 allow light to travel through if at a speed v.
calculate the value of v given that the speed...(Solved)
A glass of refractive index 1.44 allow light to travel through if at a speed v.
calculate the value of v given that the speed of light in air =3 x 10^8 m/s.
Date posted: October 6, 2017. Answers (1)
- A stone was projected upwards and reached a height of 200 m. Determine the:
i. Initial velocity of the stone (ignore air resistance and take g =...(Solved)
A stone was projected upwards and reached a height of 200 m. Determine the:
i. Initial velocity of the stone (ignore air resistance and take g = 10 m/s^2)
ii. Total time the stone is in air
Date posted: October 6, 2017. Answers (1)
- A lawn tennis ball of mass 300 g is thrown vertically upwards with a vertically of 10 m/s. The air cause a resistance of 10...(Solved)
A lawn tennis ball of mass 300 g is thrown vertically upwards with a vertically of 10 m/s. The air cause a resistance of 10 m/s. The air caused a resistance of 0.5 N.
Determine
a. The net force on the ball as it moves up. (Take g=10m/s)
b. The acceleration of the ball
c. The maximum height reached by the ball.
Date posted: October 6, 2017. Answers (1)
- A simple pendulum was used by a student to determine the acceleration due to gravity, g, she obtained the following values: L = 80.0 cm,...(Solved)
A simple pendulum was used by a student to determine the acceleration due to gravity, g, she obtained the following values: L = 80.0 cm, the period T was 1.9s. given that T=2π√(l/g) determine the value of g correct to two significant figures.
Date posted: October 6, 2017. Answers (1)
- A bullet hit a tree trunk of diameter 100 cm at a velocity of 500 m/s, emerging from the other opposite side with a velocity...(Solved)
A bullet hit a tree trunk of diameter 100 cm at a velocity of 500 m/s, emerging from the other opposite side with a velocity of 200 m/s. Determine the average deceleration of the bullet in the trunk.
Date posted: October 6, 2017. Answers (1)
- State two types of potential energy(Solved)
State two types of potential energy
Date posted: October 6, 2017. Answers (1)
- State any four sources of energy.(Solved)
State any four sources of energy.
Date posted: October 6, 2017. Answers (1)
- State any four forms of energy.(Solved)
State any four forms of energy.
Date posted: October 6, 2017. Answers (1)
- Define Energy.(Solved)
Define Energy.
Date posted: October 6, 2017. Answers (1)
- State two types of fluid flow.(Solved)
State two types of fluid flow.
Date posted: October 6, 2017. Answers (1)
- State two applications of Pressure(Solved)
State two applications of pressure.
Date posted: October 6, 2017. Answers (1)
- State two types of coefficient of Friction.(Solved)
State two types of coefficient of Friction.
Date posted: October 6, 2017. Answers (1)
- Define the coefficient of Friction(Solved)
Define the coefficient of Friction
Date posted: October 6, 2017. Answers (1)
- State two types of Friction.(Solved)
State two types of Friction.
Date posted: October 6, 2017. Answers (1)
- State and explain two types of collisions.(Solved)
State and explain two types of collisions.
Date posted: October 6, 2017. Answers (1)
- Define Impulse.(Solved)
Define Impulse.
Date posted: October 6, 2017. Answers (1)
- What is a Newton?(Solved)
What is a Newton?
Date posted: October 6, 2017. Answers (1)
- Describe a displacement time graph for a body moving at a uniform velocity from rest in a positive direction.(Solved)
Describe a displacement time graph for a body moving at a uniform velocity from rest in a positive direction.
Date posted: October 6, 2017. Answers (1)
- Define Linear motion.(Solved)
Define Linear motion
Date posted: October 6, 2017. Answers (1)