science
Grade-11
Easy
Question
Tumi presses a book against a vertical wall as shown in the sketch. Choose the correct labeled force diagram indicating all the forces acting on the book.
- None
The correct answer is:
Related Questions to study
science
Tammy travels from the ground floor to the fifth floor of a hotel in a lift. Which ONE of the following statements is TRUE about the force exerted by the floor of the lift on Tammy’s feet?
Tammy travels from the ground floor to the fifth floor of a hotel in a lift. Which ONE of the following statements is TRUE about the force exerted by the floor of the lift on Tammy’s feet?
scienceGrade-11
science
When a 0.45 g air-rifle pellet is fired into a target attached to a glider on a frictionless linear air track, the glider moves 50cm in 3.8 seconds. Calculate the magnitude of the velocity of the pellet. The glider and target have a combined mass of 643 g.
When a 0.45 g air-rifle pellet is fired into a target attached to a glider on a frictionless linear air track, the glider moves 50cm in 3.8 seconds. Calculate the magnitude of the velocity of the pellet. The glider and target have a combined mass of 643 g.
scienceGrade-11
science
A supermarket trolley loaded with shopping has a mass of 60kg. It rolls across the floor at 4 m s–1 and collides with an empty trolley of mass 25kg, which was stationary. They become fastened together and roll on as one. Calculate the magnitude of the velocity of the two trolleys when locked together.
A supermarket trolley loaded with shopping has a mass of 60kg. It rolls across the floor at 4 m s–1 and collides with an empty trolley of mass 25kg, which was stationary. They become fastened together and roll on as one. Calculate the magnitude of the velocity of the two trolleys when locked together.
scienceGrade-11
science
A Cart with a mass of 2kg travelling at 6 mS collides with another cart of mass 0.4 kg travelling in the same direction at 2 mS. It bounces off , as shown in figure 4. After impact, the 2 kg cart travels at 3 mS in the same direction. Calculate the velocity of the 0.4 kg cart after the collision.
before collision 
after collision 
FIGURE 4 I this collision, the second cart bounces off the first cart.
A Cart with a mass of 2kg travelling at 6 mS collides with another cart of mass 0.4 kg travelling in the same direction at 2 mS. It bounces off , as shown in figure 4. After impact, the 2 kg cart travels at 3 mS in the same direction. Calculate the velocity of the 0.4 kg cart after the collision.
before collision
after collision
FIGURE 4 I this collision, the second cart bounces off the first cart.
scienceGrade-11
science
A boy on roller-skates is traveling along at 8 m s–1. He has a mass of 60kg and is carrying his schoolbag of mass 10kg. He throws the bag directly forward at 20 m s–1 relative to the ground. Calculate the boy’s speed after the ‘explosion’.
A boy on roller-skates is traveling along at 8 m s–1. He has a mass of 60kg and is carrying his schoolbag of mass 10kg. He throws the bag directly forward at 20 m s–1 relative to the ground. Calculate the boy’s speed after the ‘explosion’.
scienceGrade-11
science
A 1.5-Mg car moving along a concrete road has its brakes locked and
skids to a smooth stop. Calculate the force of friction on a wet road
A 1.5-Mg car moving along a concrete road has its brakes locked and
skids to a smooth stop. Calculate the force of friction on a wet road
scienceGrade-11
science
A 1.5-Mg car moving along a concrete road has its brakes locked and
skids to a smooth stop. Calculate the force of friction on a dry Road.
A 1.5-Mg car moving along a concrete road has its brakes locked and
skids to a smooth stop. Calculate the force of friction on a dry Road.
scienceGrade-11
science
A 73-kg hockey player glides across the ice on skates with steel blades. What is the force of friction acting on the skater?
A 73-kg hockey player glides across the ice on skates with steel blades. What is the force of friction acting on the skater?
scienceGrade-11
science
. On Earth a man weighs 70 kg. On the planet Beeble how much will he
weigh if Beeble has mass half of that of the Earth and a radius one quarter that of
the Earth. Gravitational acceleration on Earth is 9,8 m·s−2.
. On Earth a man weighs 70 kg. On the planet Beeble how much will he
weigh if Beeble has mass half of that of the Earth and a radius one quarter that of
the Earth. Gravitational acceleration on Earth is 9,8 m·s−2.
scienceGrade-11
science
In the above question also calculate the coefficients of kinetic friction.
In the above question also calculate the coefficients of kinetic friction.
scienceGrade-11
science
A block of wood weighing 32 N is placed on a rough slope and a rope is
tied to it. The tension in the rope can be increased to 8 N before the block starts
to slide. A force of 4 N will keep the block moving at constant speed once it has
been set in motion. Determine the coefficients of static friction
A block of wood weighing 32 N is placed on a rough slope and a rope is
tied to it. The tension in the rope can be increased to 8 N before the block starts
to slide. A force of 4 N will keep the block moving at constant speed once it has
been set in motion. Determine the coefficients of static friction
scienceGrade-11
science
Which expression accurately describes the change of momentum of an object?
Which expression accurately describes the change of momentum of an object?
scienceGrade-11
science
A rubber ball of mass 0,8 kg is dropped and strikes the floor with an
The initial velocity of 6 m·s−1. It bounces back with a final velocity of 4 m·s−1. Calculate the change in the momentum of the rubber ball caused by the floor.
A rubber ball of mass 0,8 kg is dropped and strikes the floor with an
The initial velocity of 6 m·s−1. It bounces back with a final velocity of 4 m·s−1. Calculate the change in the momentum of the rubber ball caused by the floor.
scienceGrade-11
science
A soccer ball of mass 420 g is kicked at 20 m·s−1 towards the goal post.
Calculate the momentum of the ball.
A soccer ball of mass 420 g is kicked at 20 m·s−1 towards the goal post.
Calculate the momentum of the ball.
scienceGrade-11
science
A cart with a mass of 2kg traveling at 6 m s–1 collides with another cart of mass 1kg
traveling in the same direction at 2 m s–1. It bounces off, as shown in Figure4. After impact, the 2kg cart travels at 3 m s–1 in the same direction. Calculate the velocity of the 1kg cart after the collision.
A cart with a mass of 2kg traveling at 6 m s–1 collides with another cart of mass 1kg
traveling in the same direction at 2 m s–1. It bounces off, as shown in Figure4. After impact, the 2kg cart travels at 3 m s–1 in the same direction. Calculate the velocity of the 1kg cart after the collision.
scienceGrade-11
